首页   |  中国科学院
当前位置: 首页>CPCI收录论文
2011年
作者: 来源 : 时间:2014-09-19 字体<    >

第 1 条,共 81 条
标题: Mammographic mass segmentation: Embedding multiple features in vector-valued level set in ambiguous regions
作者: Wang, Y (Wang, Ying); Tao, DC (Tao, Dacheng); Gao, XB (Gao, Xinbo); Li, XL (Li, Xuelong); Wang, B (Wang, Bin)
来源出版物: PATTERN RECOGNITION  卷: 44  期: 9  特刊: SI  页: 1903-1915  DOI: 10.1016/j.patcog.2010.08.002  出版年: SEP 2011 
Web of Science 核心合集中的 "被引频次": 10
被引频次合计: 10
摘要: Mammographic mass segmentation plays an important role in computer-aided diagnosis systems. It is very challenging because masses are always of low contrast with ambiguous margins, connected with the normal tissues, and of various scales and complex shapes. To effectively detect true boundaries of mass regions, we propose a feature embedded vector-valued contour-based level set method with relaxed shape constraint.
In particular, we initially use the contour-based level set method to obtain the initial boundaries on the smoothed mammogram as the shape constraint. To prevent the contour leaking and meanwhile preserve the radiative characteristics of specific malignant masses, afterward, we relax the obtained shape constraint by analyzing possible valid regions around the initial boundaries. The relaxed shape constraint is then used to design a novel stopping function for subsequent vector-valued level set method. Since texture maps, gradient maps, and the original intensity map can reflect different characteristics of the mammogram, we integrate them together to obtain more accurate segmentation by incorporating the new stopping function into the newly proposed feature embedded vector-valued contour-based level set method.
The experimental results suggest that the proposed feature embedded vector-valued contour-based level set method with relaxed shape constraint can effectively find ambiguous margins of the mass regions. Comparing against existing active contours methods, the new scheme is more effective and robust in detecting complex masses. (C) 2010 Elsevier Ltd. All rights reserved.
文献类型: Article; Proceedings Paper
会议名称: 13th International Conference on Computer Analysis of Images and Patterns
会议日期: SEP 02-04, 2009
会议地点: Munster, GERMANY
作者关键词: Mass segmentation; Computer-aided diagnose; Vector-valued level set; Relaxed shape constraint; Mammograms
KeyWords Plus: COMPUTER-AIDED DIAGNOSIS; DIGITAL MAMMOGRAMS; LESION SEGMENTATION; IMAGE SEGMENTATION; ACTIVE CONTOURS; TUMOR-DETECTION; BREAST-CANCER; CLASSIFICATION; GRADIENT; FILTER
Web of Science 类别: Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic
研究方向: Computer Science; Engineering
IDS 号: 780DN
ISSN: 0031-3203
________________________________________
第 2 条,共 81 条
标题: A fast and low complexity approach for H.264/AVC intra mode decision
作者: Su, XQ (Su, XiuQin); Ji, L (Ji, Lei); Li, XA (Li, Xiang)
来源出版物: MULTIMEDIA TOOLS AND APPLICATIONS  卷: 52  期: 1  页: 65-76  DOI: 10.1007/s11042-009-0452-z  出版年: MAR 2011 
Web of Science 核心合集中的 "被引频次": 5
被引频次合计: 5
摘要: As one of the main features of H.264/AVC, intra prediction coding technique acts as a basis for encoding performance and efficiency. In official reference software Joint Model (JM), it employs the rate distortion optimization (RDO) technique to get to the best encoding performance. By full searching (FS) all of the candidate modes under the rule of RDO, peak-signal-noise-rate (PSNR) decreases to a very low level, but at the same time, the complexity of calculation increases a lot. Many researchers had devoted to searching the fast algorithm which can decrease the complexity, and had designed so many excellent and intelligent fast algorithms. In this paper we introduced a low complexity and fast approach for H.264/AVC intra prediction algorithm. The new approach is based on reducing the number of candidate modes for further RDO calculation, and decreasing the computational complicacy. It can decide the interpolation direction accurately by calculating the directional pixel-value differences (DPD) of target block, and then do statistic with the obtained values to choose the most probable modes. The experimental results demonstrate that the proposed algorithm can achieve more than 70% time saving than JM, but only a tiny degradation of encoding performance is brought in.
文献类型: Article; Proceedings Paper
会议名称: 2nd International Congress on Image and Signal Processing
会议日期: OCT 17-19, 2009
会议地点: Tianjin, PEOPLES R CHINA
作者关键词: H,264/AVC; DPD; Intra prediction; Fast algorithm
KeyWords Plus: PREDICTION
Web of Science 类别: Computer Science, Information Systems; Computer Science, Software Engineering; Computer Science, Theory & Methods; Engineering, Electrical & Electronic
研究方向: Computer Science; Engineering
IDS 号: 716RF
ISSN: 1380-7501
________________________________________
第 3 条,共 81 条
标题: Synthesis and Photoluminescence of Cr-doped Rod-like ZnO Particles by Hydrothermal Method
作者: Hang, LM (Hang, Lianmao); Zhang, ZY (Zhang, Zhiyong); Yan, JF (Yan, Junfeng)
编者: Liu SQ; Zuo M
来源出版物: EMERGING FOCUS ON ADVANCED MATERIALS, PTS 1 AND 2  丛书: Advanced Materials Research  卷: 306-307  页: 176-179  DOI: 10.4028/www.scientific.net/AMR.306-307.176  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Cr-doped rod-like ZnO particles with nominal 3 at% doping concentration were synthesized by hydrothermal method. The structural and optical properties of the sample were investigated by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM) and photoluminescence (PL). The results show that the as-synthesized product is of hexagonal wurtzite structure without metallic Cr or other secondary phases and the morphology of the ZnO particles is rod shaped. The room-temperature PL spectrum of the Cr-doped rod-like ZnO particles exhibits a strong blue emission at 440nm and two weak emission bands centered at 410nm and 565nm, respectively.
文献类型: Proceedings Paper
会议名称: 1st International Congress on Advanced Materials
会议日期: MAY 13-16, 2011
会议地点: Jinan, PEOPLES R CHINA
会议主办方: Univ Jinan
作者关键词: hydrothermal; ZnO; photoluminescence
KeyWords Plus: SUBSTRATE; NANORODS
Web of Science 类别: Materials Science, Multidisciplinary
研究方向: Materials Science
IDS 号: BBZ55
ISSN: 1022-6680
ISBN: 978-3-03785-204-0
________________________________________
第 4 条,共 81 条
标题: The Microstructure of Zinc Oxide Films Prepared by Hydrothermal Method
作者: Xia, ZL (Xia, Zhilin); Xu, Q (Xu, Qi); Zhao, LX (Zhao, Lixin)
编者: Liu SQ; Zuo M
来源出版物: EMERGING FOCUS ON ADVANCED MATERIALS, PTS 1 AND 2  丛书: Advanced Materials Research  卷: 306-307  页: 1238-1241  DOI: 10.4028/www.scientific.net/AMR.306-307.1238  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In the solutions which are prepared by mixing zinc nitrate hexahydrate, strong ammonia and methenamine in water bath at 90 Centigrade, lamellate and granular zinc oxide films have grown on different substrates such as B270 glass, glass based PAA films, pure aluminum foil and aluminum based PAA films. Films microstructures were characterized by scanning electron microscope (SEM). The influences of substrate and pH on the films microstructure were analyzed. Results reflect that: Ammonia plays an important role in the growing competition of grainy crystal; the more concentration of ammonia, the more zinc oxide crystals grow into granular. Because of the high specific area and adsorption capacity, lacunaris zinc oxide films have great application perspective in gas sensor, catalyzed sorption and biochemistry.
文献类型: Proceedings Paper
会议名称: 1st International Congress on Advanced Materials
会议日期: MAY 13-16, 2011
会议地点: Jinan, PEOPLES R CHINA
会议主办方: Univ Jinan
作者关键词: zinc oxide films; PAA films; hydrothermal method; lacunaris films
KeyWords Plus: GROWTH; NANOBELTS; NANOWIRES; NANOTUBES
Web of Science 类别: Materials Science, Multidisciplinary
研究方向: Materials Science
IDS 号: BBZ55
ISSN: 1022-6680
ISBN: 978-3-03785-204-0
________________________________________
第 5 条,共 81 条
标题: Optimizing Design of Real-time Spatial Moving Target Tracking System
作者: Liang, DS (Liang, Dong Sheng); Liu, ZH (Liu, Zhao Hui); Liu, W (Liu, Wen)
编者: Zhang LC; Zhang CL; Chen Z
来源出版物: MECHATRONICS AND MATERIALS PROCESSING I, PTS 1-3  丛书: Advanced Materials Research  卷: 328-330  页: 2234-2237  DOI: 10.4028/www.scientific.net/AMR.328-330.2234  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Achieving the detection and tracking of moving targets has been widely applied in all fields of today's society. Because of the shortcomings of traditional video tracking system, this paper proposes a novel method for designing video processing system based on hardware design of FPGA and DSP, and moving target in video can be detected and tracked by this system. In this system, DSP as the core of the system, it mainly completes the processing algorithms of video and image data, FPGA as a coprocessor, responsible for the completion of the processing of external data and logic. The hardware structure, link configuration, program code and other aspects of system are optimized. Finally, through the experiment, the input frame rate of video is 40frames/s, and the image resolution is 512pixels x 512pixels, median 16bites quantitative image sequence, the system can complete the relevant real-time detection and tracking algorithm and extract targets position of image sequences correctly. The results show that the advantage is that this system has powerful operation speed, real time, high accuracy and stability.
文献类型: Proceedings Paper
会议名称: International Conference on Mechatronics and Materials Processing (ICMMP 2011)
会议日期: NOV 18-20, 2011
会议地点: Guangzhou, PEOPLES R CHINA
作者关键词: Real-time tracking; Spatial moving target; Software optimized; DSP and FPGA
Web of Science 类别: Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Mechanics
研究方向: Engineering; Materials Science; Mechanics
IDS 号: BBI73
ISSN: 1022-6680
ISBN: 978-3-03785-238-5
________________________________________
第 6 条,共 81 条
标题: The Extracting System Design of Small Dim Targets in Complex Background
作者: Liang, DS (Liang, Dong Sheng); Liu, ZH (Liu, Zhao Hui); Liu, W (Liu, Wen)
编者: Zhang LC; Zhang CL; Chen Z
来源出版物: MECHATRONICS AND MATERIALS PROCESSING I, PTS 1-3  丛书: Advanced Materials Research  卷: 328-330  页: 2324-2327  DOI: 10.4028/www.scientific.net/AMR.328-330.2324  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: For the moving small dim targets in visible image sequences with low SNR and complex background, whose contained characters are simple and poor, they are extracted difficultly. This paper proposes a new method to detect and extract positions of small dim moving targets. According to the features of moving targets, in a very short time interval, the target trajectory is considered as a straight line approximately. Firstly, it makes use of threshold segmentation methods to extract the positions of targets in each frame, then building the motion line equations after the joint of multi-frame processing results. Finally, the position of small dim targets are detected out and extracted, and false targets are eliminated accurately. Hardware system was designed and the algorithm is implemented on hardware systems successfully. The experiment results show related functions of the system and extracting algorithm is feasible, the system is stable and has a strong process ability, which can effectively detect and extract small and dim target in complex background correctly.
文献类型: Proceedings Paper
会议名称: International Conference on Mechatronics and Materials Processing (ICMMP 2011)
会议日期: NOV 18-20, 2011
会议地点: Guangzhou, PEOPLES R CHINA
作者关键词: Target detection; Hardware design; Small dim targets; Moving trajectory
Web of Science 类别: Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Mechanics
研究方向: Engineering; Materials Science; Mechanics
IDS 号: BBI73
ISSN: 1022-6680
ISBN: 978-3-03785-238-5
________________________________________
第 7 条,共 81 条
标题: Response calculation for NOPD beam by an improved algorithm based on the endochronic theory and test verification
作者: Wang, W (Wang Wei); Li, YY (Li Yuyan)
编者: Xu LL; Tian WY; Mao E
来源出版物: INFORMATION ENGINEERING FOR MECHANICS AND MATERIALS SCIENCE, PTS 1 AND 2  丛书: Applied Mechanics and Materials  卷: 80-81  页: 845-849  DOI: 10.4028/www.scientific.net/AMM.80-81.845  子辑: 1-2  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Non-Obstructive Particle Damping (NOPD) is a new damping technique which is based on traditional particle damping and impact damping technique. NOPD Structure has a good effect on decreasing sound and vibration. A new improved algorithm based on the endochronic theory is researched in the paper. Response calculation by the algorithm and tests for NOPD beam have been done in conditions of one, two and three holes filled with tungsten particles. Results show it feasible to calculate the response of NOPD structure by the improved algorithm, which affords an effective analysis method for engineering application of NOPD technique.
文献类型: Proceedings Paper
会议名称: International Conference on Information Engineering for Mechanics and Materials (ICIMM 2011)
会议日期: AUG 13-14, 2011
会议地点: Shanghai, PEOPLES R CHINA
作者关键词: Non-obstructive particle damping; Endochronic theory; Structural response; Improved algorithm
KeyWords Plus: YIELD SURFACE; VISCOPLASTICITY
Web of Science 类别: Engineering, Mechanical; Materials Science, Multidisciplinary; Materials Science, Characterization & Testing
研究方向: Engineering; Materials Science
IDS 号: BBI68
ISSN: 1660-9336
ISBN: 978-3-03785-212-5
________________________________________
第 8 条,共 81 条
标题: Segmenting Images by Combining Selected Atlases on Manifold
作者: Cao, YH (Cao, Yihui); Yuan, Y (Yuan, Yuan); Li, XL (Li, Xuelong); Turkbey, B (Turkbey, Baris); Choyke, PL (Choyke, Peter L.); Yan, PK (Yan, Pingkun)
编者: Fichtinger G; Martel A; Peters T
来源出版物: MEDICAL IMAGE COMPUTING AND COMPUTER-ASSISTED INTERVENTION, MICCAI 2011, PT III  丛书: Lecture Notes in Computer Science  卷: 6893  页: 272-279  子辑: III  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 11
被引频次合计: 11
摘要: Atlas selection and combination are two critical factors affecting the performance of atlas-based segmentation methods. In the existing works, those tasks are completed in the original image space. However, the intrinsic similarity between the images may not be accurately reflected by the Euclidean distance in this high-dimensional space. Thus, the selected atlases may be away from the input image and the generated template by combining those atlases for segmentation can be misleading. In this paper, we propose to select and combine atlases by projecting the images onto a low-dimensional manifold. With this approach, atlases can be selected according to their intrinsic similarity to the patient image. A novel method is also proposed to compute the weights for more efficiently combining the selected atlases to achieve better segmentation performance. The experimental results demonstrated that our proposed method is robust and accurate, especially when the number of training samples becomes large.
文献类型: Proceedings Paper
会议名称: 14th International Conference on Medical Image Computing and Computer-Assisted Intervention (MICCAI 2011)
会议日期: SEP 18-22, 2011
会议地点: Toronto, CANADA
KeyWords Plus: SEGMENTATION; STRATEGIES
Web of Science 类别: Computer Science, Theory & Methods; Radiology, Nuclear Medicine & Medical Imaging
研究方向: Computer Science; Radiology, Nuclear Medicine & Medical Imaging
IDS 号: BBI77
ISSN: 0302-9743
ISBN: 978-3-642-23625-9; 978-3-642-23626-6
________________________________________
第 9 条,共 81 条
标题: NOVEL SCHEME FOR ULTRAFAST OPTICAL WAVEFORM SAMPLING BASED ON A HIGHLY NONLINEAR PHOTONIC CRYSTAL FIBER
作者: Liu, YS (Liu, Yuanshan); Zhang, JG (Zhang, Jian-Guo); Zhao, W (Zhao, Wei); Tang, DK (Tang, Dingkang)
书籍团体作者: ASME
来源出版物: 2011 INTERNATIONAL CONFERENCE ON INSTRUMENTATION, MEASUREMENT, CIRCUITS AND SYSTEMS (ICIMCS 2011), VOL 2: FUTURE COMMUNICATION AND NETWORKING  页: 253-255  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: A novel scheme is proposed for ultrafast optical waveform sampling which uses the four-wave mixing in a dispersion-flattened highly nonlinear photonic crystal fiber (DF-HNL-PCF). We report the first demonstration of an optical sampling gate by employing a 20m DF-HNL-PCF to observe the 160Gbit/s optical data signal with temporal resolution of 0.64 ps. The proposed scheme shows a potential of realizing wideband optical waveform sampling systems in a simple configuration.
文献类型: Proceedings Paper
会议名称: International Conference on Instrumentation, Measurement, Circuits and Systems (ICIMCS 2011)
会议日期: DEC 12-13, 2011
会议地点: Hong Kong, PEOPLES R CHINA
作者关键词: All optical sampling; photonic crystal fiber; four-wave mixing
KeyWords Plus: EYE-DIAGRAM MEASUREMENT
Web of Science 类别: Instruments & Instrumentation; Telecommunications
研究方向: Instruments & Instrumentation; Telecommunications
IDS 号: BBA55
ISBN: 978-0-7918-5990-2
________________________________________
第 10 条,共 81 条
标题: Theoretical modeling and experimental verification for structural response of NOPD based on endochronic theory
作者: Wang, W (Wang Wei); Li, YY (Li Yuyan)
编者: Zhou M
来源出版物: ADVANCES IN MECHANICAL ENGINEERING, PTS 1-3  丛书: Applied Mechanics and Materials  卷: 52-54  页: 800-805  DOI: 10.4028/www.scientific.net/AMM.52-54.800  子辑: 1-3  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Non-obstructive particle damping (NOPD) is a new composite damping technology based on traditional partical damping and impacting damping, and it has good vibration-reduced results. Through studying thermodynamics constraint condition for non-inverse variation of inner tissue structure of the material, the endochronic theory obtained variation regularity of inner variable, further gave out evolution path of specific non-inverse thermodynamics variable under specific condition, and thus the constitutive relationship of the material was obtained. Based on endochronic theory, an incremental form of the endochronic constitutive relationship of discrete particle was derived, and then penalty element was introduced to solve the connection problem between structure and discrete particle, lastly finite element dynamics equation of NOPD composite structure was constructed. Based on the model of NOPD composite structure, simulation and experiment for response of NOPD free beam were made. It indicated that applying endochronic theory to analyze the response of NOPD is rational, which supplied an effective method for engineering application of NOPD.
文献类型: Proceedings Paper
会议名称: 1st International Conference on Mechanical Engineering
会议日期: APR 03-04, 2011
会议地点: Phuket, THAILAND
作者关键词: Non-obstructive particle damping; Endochronic theory; Structural response; Vibration-reduced; Numerical algorithm
Web of Science 类别: Engineering, Mechanical
研究方向: Engineering
IDS 号: BAC28
ISSN: 1660-9336
ISBN: 978-3-03785-077-0
________________________________________
第 11 条,共 81 条
标题: A new processing way for helicoid reflective mirror
作者: Hu, SL (Hu, Shaolei); Xie, YJ (Xie, Yongjun); Zhao, X (Zhao, Xin)
编者: Gao J
来源出版物: ADVANCED MANUFACTURING TECHNOLOGY, PTS 1-3  丛书: Advanced Materials Research  卷: 314-316  页: 94-97  DOI: 10.4028/www.scientific.net/AMR.314-316.94  子辑: 1-3  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: A novel processing way for the continuous helicoid reflective mirrors is proposed. We use an intelligent oven to accurately control the glass temperature and successfully produce a helicoid reflective mirror in B270 glass. Then we test the shape and optical properties of the helicod reflective mirror via the three-coordinate instrument measuring and interference experiment.
文献类型: Proceedings Paper
会议名称: International Conference on Advanced Design and Manufacturing Engineering (ADME 2011)
会议日期: SEP 16-18, 2011
会议地点: Guangzhou, PEOPLES R CHINA
作者关键词: Helicoid; Reflective mirror; B270 glass; Three-coordinate measuring machine
KeyWords Plus: MODEL
Web of Science 类别: Engineering, Manufacturing; Engineering, Mechanical
研究方向: Engineering
IDS 号: BAA27
ISSN: 1022-6680
ISBN: 978-3-03785-215-6
________________________________________
第 12 条,共 81 条
标题: Analysis to the dither in torsion coupling of low speed rotor
作者: Hou, BF (Hou Bao-fen); Liu, ZH (Liu Zhao-hui); Yang, JG (Yang Jian-Guo); She, WJ (She Wen-ji)
编者: Cai Y
来源出版物: INTERNATIONAL WORKSHOP ON AUTOMOBILE, POWER AND ENERGY ENGINEERING  丛书: Procedia Engineering  卷: 16  DOI: 10.1016/j.proeng.2011.08.1061  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In order to explain the causation of dither present in the low speed rotor with solid lubrication, the relationship between rotor and bearing with the disturbance of torsion coupling is established, then the phenominon of unstability can be explained by slight oscillation. First, based on the moment balance function, the tortion balance equation is established with among motor, rotor and bearing. Then one order mode of the rotor is driven by different frequencies PWM pulses, the response of the speed approved that the resonance frequency can't be neglectable. Finally, the race coupling frequency with different speed and granulation which provided an area of optimum choice for the PWM pulse. The flexible characteristic and the granulation of the race is the direct reason which induce the imbalance, According to the inducement of torsion coupling, while the PWM pulse provide power for the coupling, all that result with low speed dither. (C) 2010 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Society for Automobile, Power and Energy Engineering
文献类型: Proceedings Paper
会议名称: International Workshop on Automobile, Power and Energy Engineering
会议日期: APR 15-17, 2011
会议地点: Wuhan, PEOPLES R CHINA
作者关键词: Low speed rotor; Torsion coupling; Dither; Resonance frequency
KeyWords Plus: SYSTEM; DYNAMICS
Web of Science 类别: Energy & Fuels; Transportation Science & Technology
研究方向: Energy & Fuels; Transportation
IDS 号: BYU22
ISSN: 1877-7058
________________________________________
第 13 条,共 81 条
标题: The static friction torque compensation of SPG by single resonance pulse
作者: Yang, JG (Yang Jian-Guo); Zhou, RK (Zhou Ren-kui); Liu, ZH (Liu Zhao-hui); Liang, DS (Liang Dong-sheng)
编者: Cai Y
来源出版物: INTERNATIONAL WORKSHOP ON AUTOMOBILE, POWER AND ENERGY ENGINEERING  丛书: Procedia Engineering  卷: 16  DOI: 10.1016/j.proeng.2011.08.1060  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Aiming to attenuate the fluctuation caused by static friction torque of the SPG, the dissipation energy produced by the slip distance from the static friction to the lubrication is analyzed based on the Hertz Contact Theory. Considering the time amplification effect of the structure resonance, the amplitude and the width of the single pulse are calculated to impulse the first order rotation mode of the SPG. Then, a formula of the compensation pulse is deduced, and At last, the disturbance caused by the slipping energy is well compensated by the vibration energy of SPG. Using this method, the torque fluctuation of passing zero speed degrade and the residual stress from the SPG to the spacecraft is reduced. At the same time, this conclusion provides a theory basis for the optimization of the controlling system. (C) 2010 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Society for Automobile, Power and Energy Engineering
文献类型: Proceedings Paper
会议名称: International Workshop on Automobile, Power and Energy Engineering
会议日期: APR 15-17, 2011
会议地点: Wuhan, PEOPLES R CHINA
作者关键词: space precision gimbal; static friction; single resonance pulse; torque compensation
Web of Science 类别: Energy & Fuels; Transportation Science & Technology
研究方向: Energy & Fuels; Transportation
IDS 号: BYU22
ISSN: 1877-7058
________________________________________
第 14 条,共 81 条
标题: A New Method of Baffle Design
作者: Mei, C (Mei Chao); Zhou, SZ (Zhou Sizhong); Ma, M (Ma Ming); Guo, ZL (Guo Zhili); Zhao, SM (Zhao Shimin)
编者: Ran C; Yang G
来源出版物: CEIS 2011  丛书: Procedia Engineering  卷: 15  DOI: 10.1016/j.proeng.2011.08.848  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Nowadays, as the development of the level of the land observation technology constantly improved, the demanded of the image quality are increasing rise. There are so many possibility factors which may influences of the image quality, especially in the inferred optical system, the main reason of them is stray light. The baffle is the main element in the observe system which can inhibit the stray lights that comes from out side of the system. The paper will show you an new idea in baffle design, we put the block aura in an angle which is not 90 degree in conventional. The design can keeps the stray lights out of the system or been greatly absorbed on the condition of low absorption rate of the baffle. We will show you the evidences of calculation, and gave you the basis of the design.
文献类型: Proceedings Paper
会议名称: International Conference on Advanced in Control Engineering and Information Science (CEIS)
会议日期: AUG 18-19, 2011
会议地点: Dali, PEOPLES R CHINA
作者关键词: stray light; baffle; block aura
Web of Science 类别: Automation & Control Systems
研究方向: Automation & Control Systems
IDS 号: BYZ94
ISSN: 1877-7058
________________________________________
第 15 条,共 81 条
标题: Design Of Catadioptric Infrared Optical System With Wide Field
作者: Wang, WF (Wang Wen-fang); Yang, XX (Yang Xiao-xu); Zhang, HJ (Zhang Hen-jin); Li, G (Li Gang)
编者: Ran C; Yang G
来源出版物: CEIS 2011  丛书: Procedia Engineering  卷: 15  DOI: 10.1016/j.proeng.2011.08.858  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Many infrared optical systems usually adopt catoptric systems. Because that the system does not have chromatism and restriction of the working wave. But the coma and astigmatism of off-axis point is large, so the field of view that we can use is restricted. In the needs of infrared early warning system for sea-based, a large field of catadioptric infrared optical system is designed. The optical system breaks the limitation of traditional reflective optical system with small field of view. The system adopts two methods to expand the field of view. One is adding the calibration group before the reflecting system. The other one is that the primary and secondary reflective mirror system are used of Mangin mirror. So the optical system avoids any high-order aspheric surface. In order to match the cold aperture exactly, lens group is inserted after the first image plane. The system's field can reach 8 degree, and the ratio of obscuration is less than 0.4, and also optical transfer function achieves diffraction limit. (C) 2011 Published by Elsevier Ltd.
文献类型: Proceedings Paper
会议名称: International Conference on Advanced in Control Engineering and Information Science (CEIS)
会议日期: AUG 18-19, 2011
会议地点: Dali, PEOPLES R CHINA
作者关键词: Mangin mirror; catadioptric infrared optical system; infrared early warning; large filed
Web of Science 类别: Automation & Control Systems
研究方向: Automation & Control Systems
IDS 号: BYZ94
ISSN: 1877-7058
________________________________________
第 16 条,共 81 条
标题: The research of attack angle measurement of projectile with CCD vertical target system
作者: Xu, W (Xu Wei); Wang, M (Wang Miao)
编者: Ran C; Yang G
来源出版物: CEIS 2011  丛书: Procedia Engineering  卷: 15  DOI: 10.1016/j.proeng.2011.08.886  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Based on the coordinate measurement principle of the CCD vertical target system, a new method is proposed to measure the attack angle of flying projectile. It mainly analyze the coordinate measurement accuracy of the system and derive the formula for measuring the attack angle; In practical test, the attack angle measurement accuracy was proved to meet the request. The experimental results show that the method is feasible, and the CCD vertical target system not only measure the coordinates of flying projectile but also obtain the attack angle simultaneously, so that expand a wider range of applications of CCD vertical target measurement system. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of [CEIS 2011]
文献类型: Proceedings Paper
会议名称: International Conference on Advanced in Control Engineering and Information Science (CEIS)
会议日期: AUG 18-19, 2011
会议地点: Dali, PEOPLES R CHINA
作者关键词: CCD vertical target; attack angle measurement; analysis of accuracy
Web of Science 类别: Automation & Control Systems
研究方向: Automation & Control Systems
IDS 号: BYZ94
ISSN: 1877-7058
________________________________________
第 17 条,共 81 条
标题: Studies on Crystal Attitude Error Tolerance in Double Crystal Monochromator
作者: Yang, XX (Yang Xiao-xu); Jiang, B (Jiang Bo); Guo, ZL (Guo Zhi-li); Ma, M (Ma Ming); Zhou, SZ (Zhou Si-zhong); Zhao, SM (Zhao Shi-min)
编者: Ran C; Yang G
来源出版物: CEIS 2011  丛书: Procedia Engineering  卷: 15  DOI: 10.1016/j.proeng.2011.08.999  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The crystal attitude is necessary to be adjusted with the Bragg angle adjustment process because these crystals are moved to keep a fixed exit beam position and other reasons. The adjustment accuracy of these crystals attitude has some influence for Bragg angle, and the energy accuracy of output beam is affected father. These relationships between Bragg angle accuracy and crystal attitude angle are given. The analyzing results show that yaw angle of the first crystal has no influence over Bragg angle. Roll angle and pitch angle of double crystals have different influence over Bragg angle. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of [CEIS 2011]
文献类型: Proceedings Paper
会议名称: International Conference on Advanced in Control Engineering and Information Science (CEIS)
会议日期: AUG 18-19, 2011
会议地点: Dali, PEOPLES R CHINA
作者关键词: synchrotron radiation; double-crystal monochromator; crystal attitude; Bragg angle
KeyWords Plus: RADIATION
Web of Science 类别: Automation & Control Systems
研究方向: Automation & Control Systems
IDS 号: BYZ94
ISSN: 1877-7058
________________________________________
第 18 条,共 81 条
标题: Experimental investigation on vibration-reduced characteristics of non-obstructive particle damping for free beam structure
作者: Wang, W (Wang, Wei); Li, YY (Li, Yuyan)
编者: Chen R; Yao WL
来源出版物: FRONTIERS OF MANUFACTURING SCIENCE AND MEASURING TECHNOLOGY, PTS 1-3  丛书: Advanced Materials Research  卷: 230-232  页: 867-871  DOI: 10.4028/www.scientific.net/AMR.230-232.867  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Non-obstructive particle damping is a composite damping technology based on traditional particle damping and impact damping. Being Compared with viscous elastic damping structure, advantage of NOPD is damping characteristic of system improved greatly on the basis of specific whole designing structure and whole mass. The technology has good general vibration-reduced outcome. Beam structure is a common structural element form in engineering application. Because of vibration or instability of beam under external excitation, in this paper, free beam is regarded as an object, and many factors affecting damping characteristic of NOPD are studied, which supplies referring results for engineering application of NOPD.
文献类型: Proceedings Paper
会议名称: International Conference on Frontiers of Manufacturing Science and Measuring Technology (ICFMM2011)
会议日期: JUN 23-24, 2011
会议地点: Chongqing, PEOPLES R CHINA
作者关键词: Free beam; Non-obstructive particle damping technology; Vibration-reduced
Web of Science 类别: Engineering, Manufacturing; Engineering, Mechanical
研究方向: Engineering
IDS 号: BZU24
ISSN: 1022-6680
ISBN: 978-3-03785-133-3
________________________________________
第 19 条,共 81 条
标题: ESTIMATING PATIENT-SPECIFIC SHAPE PRIOR FOR MEDICAL IMAGE SEGMENTATION
作者: Zhang, WX (Zhang, Wuxia); Yan, PK (Yan, Pingkun); Li, XL (Li, Xuelong)
书籍团体作者: IEEE
来源出版物: 2011 8TH IEEE INTERNATIONAL SYMPOSIUM ON BIOMEDICAL IMAGING: FROM NANO TO MACRO  丛书: IEEE International Symposium on Biomedical Imaging  页: 1451-1454  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 7
被引频次合计: 7
摘要: Image segmentation is one of the key problems in medical image analysis. This paper presents a new statistical shape model for automatic image segmentation. In contrast to the previous model based segmentation methods, where shape priors are estimated from a general population-based shape model, our proposed method aims to estimate patient-specific shape priors to achieve more accurate segmentation by using manifold learning techniques. The proposed shape prior estimation method is incorporated into a deformable model based framework for image segmentation. The effectiveness of the proposed method has been demonstrated by the experiments on segmenting the prostate from MR images.
文献类型: Proceedings Paper
会议名称: 8th IEEE International Symposium on Biomedical Imaging (ISBI) - From Nano to Macro
会议日期: MAR 30-APR 02, 2011
会议地点: Chicago, IL
作者关键词: image segmentation; shape modeling; manifold learning
Web of Science 类别: Engineering, Biomedical; Radiology, Nuclear Medicine & Medical Imaging
研究方向: Engineering; Radiology, Nuclear Medicine & Medical Imaging
IDS 号: BYH79
ISSN: 1945-7928
ISBN: 978-1-4244-4128-0
________________________________________
第 20 条,共 81 条
标题: Optimizing the Phase-Matching Parameters of a BIBO Crystal for Ultrafast Spontaneous Parametric Down Conversion
作者: Huo, GW (Huo, Guang-Wen); Zhang, TY (Zhang, Tong-Yi); Wan, RG (Wan, Ren-Gang); Zhang, MZ (Zhang, Mei-Zhi); Cheng, GH (Cheng, Guang-Hua); Zhao, W (Zhao, Wei)
编者: Kasper E; Yu J; Li X; Zhang X; Xia J; Chu J; Dong Z; Hu B; Shen Y
来源出版物: PHOTONICS AND OPTOLECTRONICS MEETINGS (POEM) 2011: OPTOELECTRONIC DEVICES AND INTEGRATION  丛书: Proceedings of SPIE  卷: 8333  文献号: 833313  DOI: 10.1117/12.918955  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We analyze and optimize the parameters of the Type I spontaneous parametric down-conversion (SPDC) process in BiB3O6 (BIBO) crystal directly from calculations. This can be used to construct a system to generate ultrafast entangled photon pairs, which play an important role in quantum communication, quantum positioning, and quantum clock synchronization. Our work on the problem makes it clear that the optimal phase matching orientation in the process of SPDC is a key mechanism in the BIBO crystal in a way that appears not to have been appreciated before. In the case of omega = 0.405 mu m, the numerical results of the optimization parameters at room temperature (295 K) are theta = 152.00 degrees, phi = 90 degrees, and d(eff) = 3.48 pm/V. Finally, we use a pair of 0.6 mm thick biaxial BIBO crystals to construct an ultrafast entangled photon source, where the crystals are stacked together perpendicularly and pumped by a 405 nm pulsed laser doubling from a Tsunami mode-locked Ti:sapphire laser.
文献类型: Proceedings Paper
会议名称: 4th International Photonics and Optoelectronics Meetings (POEM) - Optoelectronic Devices and Integration/10th International Conference on Photonics and Imaging in Biology and Medicine (PIBM)
会议日期: NOV 02-05, 2011
会议地点: Wuhan, PEOPLES R CHINA
作者关键词: SPDC; phase matching; BIBO crystal; ultra-fast entangled photon source
KeyWords Plus: INTRACAVITY 2ND-HARMONIC GENERATION; NONLINEAR-OPTICAL-CRYSTALS; BISMUTH BORATE BIB3O6; 1.06 MU-M; BIAXIAL CRYSTALS; 3-WAVE INTERACTIONS; ENTANGLED PHOTONS; COEFFICIENTS; DIRECTIONS; SYMMETRY
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: BZE72
ISSN: 0277-786X
ISBN: 978-0-81948-990-6
________________________________________
第 21 条,共 81 条
标题: Catadioptric dual-zone Fresnel Condenser with super relative Aperture
作者: Wang, J (Wang Jing); Qu, ES (Qu En-shi); Yang, HT (Yang Hong-tao); Cao, JZ (Cao Jian-zhong); Fan, ZY (Fan Zhe-yuan)
编者: Kasper E; Yu J; Li X; Zhang X; Xia J; Chu J; Dong Z; Hu B; Shen Y
来源出版物: PHOTONICS AND OPTOLECTRONICS MEETINGS (POEM) 2011: OPTOELECTRONIC DEVICES AND INTEGRATION  丛书: Proceedings of SPIE  卷: 8333  文献号: 83330W  DOI: 10.1117/12.916939  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The paper introduces a kind of super relative aperture condenser which has the strcuture of spherical Fresnel surface with catadioptric projection optical system, it would improve the condensing capacity and light efficiency substantially. The condenser is composed of two sections with a center and an outer ring, the center region adopted the basic structure of the Fresnel lens with the Fresnel of laplace domain continuous curve transmission type, and the outer structure which achieve light collimating or focusing by total reflection is stepped. The paperstudies the parameter and alforithm of this catadioptric dual-zone Fresnel condenser and gives the surface data of total reflection region. Based on the method of establishing the entity model, we design a set of lens with the relative aperture F=0.3, simulate the condensing ability of the lens by the simulation software, and verify that the lens have a very good effect on focusing.
文献类型: Proceedings Paper
会议名称: 4th International Photonics and Optoelectronics Meetings (POEM) - Optoelectronic Devices and Integration/10th International Conference on Photonics and Imaging in Biology and Medicine (PIBM)
会议日期: NOV 02-05, 2011
会议地点: Wuhan, PEOPLES R CHINA
作者关键词: optical design; Fresnel condenser; catadioptric dual structure; relative aperture
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: BZE72
ISSN: 0277-786X
ISBN: 978-0-81948-990-6
________________________________________
第 22 条,共 81 条
标题: Experiments on a Compact and Robust Polarization-Entangled Photon Source
作者: Zhang, SW (Zhang, Shi-Wei); Zhang, TY (Zhang, Tong-Yi); Yao, YP (Yao, Yin-Ping); Wan, RG (Wan, Ren-Gang); Zou, SW (Zou, Sheng-Wu)
编者: Kasper E; Yu J; Li X; Zhang X; Xia J; Chu J; Dong Z; Hu B; Shen Y
来源出版物: PHOTONICS AND OPTOLECTRONICS MEETINGS (POEM) 2011: OPTOELECTRONIC DEVICES AND INTEGRATION  丛书: Proceedings of SPIE  卷: 8333  文献号: 833314  DOI: 10.1117/12.918835  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We construct a compact polarization-entangled photon source using type-II degenerate spontaneous parametric down-conversion (SPDC) in beta-barium borate (BBO) crystal pumped by a 405 nm violet laser diode. In order to compensate the spatial displacement and the temporal delay due to the birefringence and dispersion effect of signal and idler photons, we make the down-converted photon pairs pass through a half wave plate and an additional BBO crystal with the half thickness of the original one. This improves the visibility of two-photon interference by eliminating the distinguishability of the paired photons. We measure the polarization correlations by two adjustable polarization analyzer in two conjugate bases, H/V and +45 degrees/-45 degrees, respectively. The polarization analyzer consists of a polarization beam splitter cube preceded by a rotatable half wave plate. When rotating one of the half wave plates and keeping the other one at fixed angle, we obtain the expected sin(2) dependence of the coincidence counts. The highly visible sinusoidal coincidence indicates the violation of the Bell inequality and demonstrates the high quality of the polarization-entangled photon source. This compact polarization-entangled photon source is easily configurable and robust to demonstrate optical quantum information processing.
文献类型: Proceedings Paper
会议名称: 4th International Photonics and Optoelectronics Meetings (POEM) - Optoelectronic Devices and Integration/10th International Conference on Photonics and Imaging in Biology and Medicine (PIBM)
会议日期: NOV 02-05, 2011
会议地点: Wuhan, PEOPLES R CHINA
作者关键词: SPDC; BBO; polarization-entangled; phase matching; polarization analysis
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: BZE72
ISSN: 0277-786X
ISBN: 978-0-81948-990-6
________________________________________
第 23 条,共 81 条
标题: LEARNING SHAPE STATISTICS FOR HIERARCHICAL 3D MEDICAL IMAGE SEGMENTATION
作者: Zhang, WX (Zhang, Wuxia); Yuan, Y (Yuan, Yuan); Li, XL (Li, Xuelong); Yan, PK (Yan, Pingkun)
书籍团体作者: IEEE
来源出版物: 2011 18TH IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)  丛书: IEEE International Conference on Image Processing ICIP  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Accurate image segmentation is important for many medical imaging applications, whereas it remains challenging due to the complexity in medical images, such as the complex shapes and varied neighbor structures. This paper proposes a new hierarchical 3D image segmentation method based on patient-specific shape prior and surface patch shape statistics (SURPASS) model. In the segmentation process, a coarse-to-fine, two-stage strategy is designed, which contains global segmentation and local segmentation. In the global segmentation stage, patient-specific shape prior is estimated by using manifold learning techniques to achieve the overall segmentation. In the second stage, SURPASS is computed to solve the problem of poor segmentation at certain surface patches. The effectiveness of the proposed 3D image segmentation method has been demonstrated by the experiments on segmenting the prostate from a series of MR images.
文献类型: Proceedings Paper
会议名称: 18th IEEE International Conference on Image Processing (ICIP)
会议日期: SEP 11-14, 2011
会议地点: Brussels, BELGIUM
作者关键词: 3D image segmentation; shape modeling; manifold learning; surface patch shape statistics
KeyWords Plus: MODELS
Web of Science 类别: Engineering, Electrical & Electronic; Imaging Science & Photographic Technology
研究方向: Engineering; Imaging Science & Photographic Technology
IDS 号: BYI89
ISSN: 1522-4880
ISBN: 978-1-4577-1303-3
________________________________________
第 24 条,共 81 条
标题: PUTTING IMAGES ON A MANIFOLD FOR ATLAS-BASED IMAGE SEGMENTATION
作者: Cao, YH (Cao, Yihui); Yuan, Y (Yuan, Yuan); Li, XL (Li, Xuelong); Yan, PK (Yan, Pingkun)
书籍团体作者: IEEE
来源出版物: 2011 18TH IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)  丛书: IEEE International Conference on Image Processing ICIP  页: 289-292  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In medical image analysis, atlas-based segmentation has become a popular approach. Given a target image, how to select the atlases with the similar shape of anatomical structure to the input image is one of the most critical factors affecting the segmentation accuracy. In this paper, we propose a novel strategy by putting the images on a manifold to analyze the intrinsic similarity between the images. A subset of atlases can be selected and the optimal fusion weights are computed in a low-dimensional manifold space. Finally, it combines the selected atlases by using the corresponding weights for image segmentation. The experimental results demonstrated that our proposed method is robust and accurate especially when a large number of training samples are available.
文献类型: Proceedings Paper
会议名称: 18th IEEE International Conference on Image Processing (ICIP)
会议日期: SEP 11-14, 2011
会议地点: Brussels, BELGIUM
作者关键词: image segmentation; atlas-based; manifold learning; fusion
KeyWords Plus: MR-IMAGES; SELECTION
Web of Science 类别: Engineering, Electrical & Electronic; Imaging Science & Photographic Technology
研究方向: Engineering; Imaging Science & Photographic Technology
IDS 号: BYI89
ISSN: 1522-4880
ISBN: 978-1-4577-1303-3
________________________________________
第 25 条,共 81 条
标题: A NOVEL ALTERNATIVE ALGORITHM FOR LIMITED ANGLE TOMOGRAPHY
作者: Lu, XQ (Lu, Xiaoqiang); Yuan, Y (Yuan, Yuan); Yan, PK (Yan, Pingkun); Li, XL (Li, Xuelong)
书籍团体作者: IEEE
来源出版物: 2011 18TH IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)  丛书: IEEE International Conference on Image Processing ICIP  页: 409-412  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: This paper studies incomplete data problems of circular cone-beam computed tomography, which occur frequently in medical imaging and industrial imaging. The incomplete data problems in which projection data are only available in an angular range can be attributed to the limited angle tomography. Limited angle tomography is a severely ill-posed inverse problem. In recent years, image reconstruction based on total variation (TV) was employed to reduce the problem and gave better performance on edge-preserving reconstruction. However, the artificial parameter can only be determined through considerable experimentation. In this paper, an alternating minimization method based on TV is proposed to reduce the data insufficiency in tomographic imaging. This novel alternating minimization method provides a robust and effective reconstruction without any artificial parameter in the iterative processes, by using the TV as a multiplicative constraint. The results demonstrate that this new reconstruction method brings satisfactory performance.
文献类型: Proceedings Paper
会议名称: 18th IEEE International Conference on Image Processing (ICIP)
会议日期: SEP 11-14, 2011
会议地点: Brussels, BELGIUM
作者关键词: Limited angle tomography; Alternating minimization; Total variation
KeyWords Plus: X-RAY TOMOGRAPHY; IMAGE-RECONSTRUCTION
Web of Science 类别: Engineering, Electrical & Electronic; Imaging Science & Photographic Technology
研究方向: Engineering; Imaging Science & Photographic Technology
IDS 号: BYI89
ISSN: 1522-4880
ISBN: 978-1-4577-1303-3
________________________________________
第 26 条,共 81 条
标题: ROBUST COLOR CORRECTION IN STEREO VISION
作者: Wang, Q (Wang, Qi); Yan, PK (Yan, Pingkun); Yuan, Y (Yuan, Yuan); Li, XL (Li, Xuelong)
书籍团体作者: IEEE
来源出版物: 2011 18TH IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)  丛书: IEEE International Conference on Image Processing ICIP  页: 965-968  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 2
被引频次合计: 2
摘要: The phenomenon of color discrepancy between image pairs happens frequently in stereo vision systems. This inconsistence in color domain may cause difficulties when identifying point correspondence to reconstruct the scene depth. In this paper, we propose a robust algorithm to correct the color discrepancy between images. The proposed algorithm neither requires a color calibration chart/object which is a tedious procedure, nor explicitly compensates for the image as a whole, which possibly give bad correction results in local areas of an image. Instead, we correct the image region by region. Experiments show that the presented color correction algorithm is effective and efficient.
文献类型: Proceedings Paper
会议名称: 18th IEEE International Conference on Image Processing (ICIP)
会议日期: SEP 11-14, 2011
会议地点: Brussels, BELGIUM
作者关键词: Color correction; stereo vision; SIFT
Web of Science 类别: Engineering, Electrical & Electronic; Imaging Science & Photographic Technology
研究方向: Engineering; Imaging Science & Photographic Technology
IDS 号: BYI89
ISSN: 1522-4880
ISBN: 978-1-4577-1303-3
________________________________________
第 27 条,共 81 条
标题: A Study on the Buffeting Aberrance Regulation of TDICCD Mapping Camera
作者: Bai, Z (Bai Zhe); Ma, Z (Ma Zhen); Zhang, BH (Zhang Boheng)
编者: Ikeda M; Wu N; Zhang G; Ai K
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: ADVANCES IN IMAGING DETECTORS AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8194  文献号: 819430  DOI: 10.1117/12.900996  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In this paper, the fundamental of the TDICCD mapping camera is introduced, and the influence of the satellite buffeting on the image quality of the TDICCD camera is analyzed. In order to reduce the influence, a regulated resolution is put forward. Compared with the traditional TDICCD mapping camera, a special TDICCD focal plane which several TDICCD devices splited joint end to end is designed. A great deal of information are captured through the focal plane, and a mathematical model is established to analyze the data information. Then the results are feed back to the satellite, and the attitude of the satellite is actively regulated in real time. Finally, make experiments and simulation to validate it. The experiment result indicate that the design is valid.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Advances in Imaging Detectors and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: mapping camera; TDICCD; the buffeting aberrance; regulation
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: BWV60
ISSN: 0277-786X
ISBN: 978-0-81948-835-0
________________________________________
第 28 条,共 81 条
标题: Integrated Solution for High Resolution CCD Camera Imaging Circuits
作者: Bai, Z (Bai Zhe); Xu, YB (Xu Yanbing); Zhang, BH (Zhang Boheng); Duan, KL (Duan Kailiang)
编者: Ikeda M; Wu N; Zhang G; Ai K
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: ADVANCES IN IMAGING DETECTORS AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8194  文献号: 819432  DOI: 10.1117/12.901001  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In this paper, compared with the traditional CCD camera imaging circuits, a kind of integrated solution for CCD imaging circuits is put forward. The principle of the traditional CCD camera imaging circuits is described briefly, and the foundational functions are introduced. CCD imaging circuits are the most important parts of the CCD camera, and they are mainly made up of CCD driver circuits and CCD signal processing circuits. The CCD signal processing circuits mainly consist of timing generator, preamplifier circuits, CDS circuits, low-pass filter circuits, PGA circuits, ADC circuits, storage circuits, output interface circuits, and so on. The popular solution is that all the circuits are made with separate components. Complex circuit configuration, difficult debugging, uptight power dissipation are evident. However, it goes without saying that the integrated solutions which combine ADC with FPGA device are high integration, simple configuration and better agility. Finally, the integrated solution for CCD imaging circuits is illustrated, and the problems of the circuits are analyzed and summarized in detail.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Advances in Imaging Detectors and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: High-resolution; CCD camera; Imaging circuits; Integrated Solutions
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: BWV60
ISSN: 0277-786X
ISBN: 978-0-81948-835-0
________________________________________
第 29 条,共 81 条
标题: A practical method to Extending Dynamic Range of CCD Camera
作者: Chen, Z (Chen, Zhi); Qiu, YH (Qiu, Yuehong); Wen, Y (Wen, Yan); Jiang, BT (Jiang, Baotan); Gao, B (Gao, Bo)
编者: Ikeda M; Wu N; Zhang G; Ai K
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: ADVANCES IN IMAGING DETECTORS AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8194  文献号: 819417  DOI: 10.1117/12.900007  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: CCD (Charge Coupled Device) is the most popular detector for camera to detect low levels of light for wavelengths from 300nm to 1100nm. Contemporary CCD has read noise level equivalent to a few electrons, and Well capacity over 100,000 electrons. In order to take full advantage of these characteristics, it needs the dynamic of ADC must exceed the dynamic of the CCD. That is the number of bits provided by the ADC must exceed 16 bits. While the high reliability and inexpensive 16-20 bit A/D converter is few. In this paper, we firstly analyze CCD noise and then present the principle to extend the dynamic of the CCD in signal processing chain using two low resolution ADC with different sensitivity. At last we present a concrete example of improving the resolution of the ADC is by tow parallel low resolution ADCS with developing software to suitably process the converted analog-to-digital signal to achieve the same effect as a higher resolution ADC.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Advances in Imaging Detectors and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: CCD; dynamic range; signal to noise; signal processing
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: BWV60
ISSN: 0277-786X
ISBN: 978-0-81948-835-0
________________________________________
第 30 条,共 81 条
标题: Optical imaging based on compressive sensing
作者: Li, S (Li Shen); Ma, CW (Ma Cai-wen); Xia, AL (Xia Ai-li)
编者: Ikeda M; Wu N; Zhang G; Ai K
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: ADVANCES IN IMAGING DETECTORS AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8194  文献号: 81942H  DOI: 10.1117/12.900691  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Compressive Sensing (CS) is a new sampling framework that provides an alternative to the well-known Shannon sampling theory. The basic idea of CS theory is that a signal or image, unknown but supposed to be sparse or compressible in some basis, can be subjected to fewer measurements than the nominal number of pixels, and yet be accurately reconstructed. By designing optical sensors to measure inner products between the scene and a set of test functions according to CS theory, we can use sophisticated computational methods to infer critical scene structure and content for significantly economizing the resources in data acquisition store and transmit. In this paper, we investigate how CS can provide new insights into optical imaging including optical devices. We first give a brief overview of the CS theory and reviews associated fast numerical reconstruction algorithms. Next, this paper explores the potential of several different physically realizable optical systems based on CS principles. In the end, we briefly discuss possible implication in the areas of data compression and optical imaging.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Advances in Imaging Detectors and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Sparsity; Data acquisition; Image Coding; Reconstruction algorithms; Single-pixel camera; Compressive sensing
KeyWords Plus: ORTHOGONAL MATCHING PURSUIT; SIGNAL RECOVERY; RANDOM PROJECTIONS; RECONSTRUCTION; DECOMPOSITION; INFORMATION; ALGORITHM; NORM
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: BWV60
ISSN: 0277-786X
ISBN: 978-0-81948-835-0
________________________________________
第 31 条,共 81 条
标题: Technology research of high-definition CCD camera Based on FPGA
作者: Tian, Y (Tian Yan); Cao, JZ (Cao Jian-zhong); Yao, DW (Yao Da-wei); Xu, ZH (Xu Zhao-hui); Huang, J (Huang Jing)
编者: Ikeda M; Wu N; Zhang G; Ai K
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: ADVANCES IN IMAGING DETECTORS AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8194  文献号: 819425  DOI: 10.1117/12.900523  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: This paper researches the digital high definition imaging technology and successfully designs a digital high definition camera system. The system takes large array CCD(KAI-2093CM) which conforms to SMEPT 274M standard as photoelectric transfer device, FPGA+AFE as framework, HD-SDI as transforming interface, and combines with the current advanced digital high definition video standard. The result of imaging shows that the high definition camera can realize high definition shooting. The pictures are clear and can be displayed with no stagnation in real time. Moreover, the small camera with high resolution can be applied for high definition shooting in aerospace and other fields. CCD Image Sensor, High-Definition Imaging, FPGA+AFE, High-definition Serial Digital Interface
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Advances in Imaging Detectors and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: BWV60
ISSN: 0277-786X
ISBN: 978-0-81948-835-0
________________________________________
第 32 条,共 81 条
标题: Long focal length large-aperture switch-zoom system design
作者: Wang, YB (Wang Yan-bin); Duan, J (Duan Jing); Jin, HM (Jin Hu-min); Jiang, K (Jiang Kai); Zhang, HJ (Zhang Heng-jin)
编者: Ikeda M; Wu N; Zhang G; Ai K
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: ADVANCES IN IMAGING DETECTORS AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8194  文献号: 81941O  DOI: 10.1117/12.900258  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Compared with continuous zoom system, switch-zoom system has many advantages, such as simple structure, perfect imaging quality and easy fixing. A set of long focal length large-aperture visible switch-zoom system is designed in this paper. The system is composed of two parts: the front R-C object lens and the back switch-zoom system. When the back system is reversed, 1500 similar to 3000mm switch-zoom can be realized. In order to match the front R-C object lens' exit pupil with the back switch-zoom lens' entrance pupil, the front R-C object lens is controlled to be telecentric and the back switch-zoom system is telecentric at both image and object. The back switch-zoom system's object NA at short focal position is controlled to be equal to the front R-C object lens' image NA. Thus, the two parts can match with each other properly and the whole long focal length large-aperture visible switch-zoom system is designed. When the spatial frequency is 50lp/mm, the MTF of the R-C system and the back switch-zoom system are reaching to the diffraction limit to ensure the MTF of the whole system at both long focal position and short focal position. The RMS at each focal position is less than 10um. From the first surface to image plane, the overall length is 1100mm. The designed result shows that this zoom system has the advantages of simple structure, high image quality and easy fixing.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Advances in Imaging Detectors and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: long focal length; large-aperture; switch-zoom; NA; Optical design
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: BWV60
ISSN: 0277-786X
ISBN: 978-0-81948-835-0
________________________________________
第 33 条,共 81 条
标题: Research on UV detector technology and application in MAWS
作者: Yao, DW (Yao Da-wei); Hao, W (Hao Wei); Yang, XJ (Yang Xiao-jun); Tian, Y (Tian Yan)
编者: Ikeda M; Wu N; Zhang G; Ai K
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: ADVANCES IN IMAGING DETECTORS AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8194  文献号: 819436  DOI: 10.1117/12.901021  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The atmospheric transmission characteristics of ultraviolet radiation are unique, which have made ultraviolet detecting technology has been developed rapidly in military application domain. Missile approaching warning system based UV detecting technology distinguish target by detecting the ultraviolet radiation in solar blind spectrum from missile's plumes. This warning system is a passive warning system, which has advantages of good concealment, low false-alarm rate, cooling without low temperature, small size and light weight. It has been an important part of modern battlefield in the electro-optical countermeasure domain This paper expatiate the principle of ultraviolet detecting technology and introduce the developments about ultraviolet warning and related technology, including the ultraviolet transmission in the atmosphere, the ultraviolet radiance characteristic of target and background, the ultraviolet photoelectric detectors, and the ultraviolet detection technology. A suit of ultraviolet photoelectric imaging system has been designed. This system is made up of three parts, there are narrowband ultraviolet optical system in large field, ultraviolet ICCD camera and ultraviolet warming image processing device. A great deal of imaging experiments about ultraviolet target in several kinds of typical meteorological condition have been done, these images shows the system is efficient and reasonable. The characteristics of ultraviolet objective imaging be tested and evaluated by analyze the experiment images obtained by the system. This system provide theoretical and test bases for engineering research on ultraviolet missile approaching warning system.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Advances in Imaging Detectors and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Ultraviolet detector; Sensitive; Ultraviolet radiation; Ultraviolet warning system; Target imaging
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: BWV60
ISSN: 0277-786X
ISBN: 978-0-81948-835-0
________________________________________
第 34 条,共 81 条
标题: Using An Acousto-optic Tunable Filters For Hyper Spectro-polarimetric Imaging
作者: Chang, LY (Chang Ling-ying); Zhao, BC (Zhao Bao-chang); Wen, DS (Wen De-sheng); Chen, RL (Chen Rong-li); Qiu, YH (Qiu Yue-hong)
编者: Zarnecki JC; Nardell CA; Shu R; Yang J; Zhang Y
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: SPACE EXPLORATION TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8196  文献号: 81961S  DOI: 10.1117/12.901014  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Of all the hyperspectral imaging system using the optical filtering elements available,. AOTF(Acousto-optic tunable filters) is best to choose a filtering optical element that has high-speed spectral selectivity with high resolution, it can greatly reduces the amount of data collection and processing. In this paper, First, the work principle of AOTF was introduced, then described the AOTF imaging system, it covers the spectral band from 400nm to 900nm with a spectral resolution of near 2nm at 400nm and 10nm at 900nm. The device can provide about 2.2 degrees view field angle and 10mm aperture, which included TeO2 crystal, image optical system, a charged coupled device(CCD) camera, rf electronics and control and processing software. Finally the paper presented the results of laboratory image testing.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Space Exploration Technologies and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: hperspectral imaging; imaging spectrometer; AOTF; polarization
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied
研究方向: Engineering; Optics; Physics
IDS 号: BWV64
ISSN: 0277-786X
ISBN: 978-0-81948-837-4
________________________________________
第 35 条,共 81 条
标题: Design of Bipod Flexures for Space Mirror
作者: Chu, CB (Chu Chang-bo); Li, YC (Li Ying-cai); Chai, WY (Chai Wen-yi); Fan, XW (Fan Xue-wu)
编者: Zarnecki JC; Nardell CA; Shu R; Yang J; Zhang Y
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: SPACE EXPLORATION TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8196  文献号: 819620  DOI: 10.1117/12.902227  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Bipod flexures are used in many high-precision space mirror mount applications. The flexures are used to provide moment isolation for the mirror to minimize surface figure distortion resulting from mount assembly error or distortion of the mount temperature-change-induced. In this paper, we developed a bipod flexure for the Zerodur primary mirror with diameter 520 mm and thickness 70 mm. The characteristic of the bipod flexure is the two-strip flexure on the top and bottom of each leg. By those, the bending stress in mirror resulting from the mount assembly is remarkably reduced. Thanking to a semi-open structure with small mouth and big stomach in the back and a six parts symmetrical honeycomb structure for the primary mirror, using the FEA (Finite Element Analysis) method we analyze that how the axial and circumferential locations of the three bipod flexures impact mirror surface figure and gain the better result after optimization. In the design of the detail bipod flexures, thickness of the blade is analyzed and compared; also we achieve an optimization design. The two results demonstrate that the bipod flexures could keep the precision of the mirror surface figure under the load of external force and thermal constraints and meanwhile they could keep stability of structure.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Space Exploration Technologies and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Space Mirror; Bipod Flexure; FEA; Thermal Stability
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied
研究方向: Engineering; Optics; Physics
IDS 号: BWV64
ISSN: 0277-786X
ISBN: 978-0-81948-837-4
________________________________________
第 36 条,共 81 条
标题: Development of control circuits for the CCD Stereo Camera of Chang'E-1 satellite based on FPGA
作者: Duan, YQ (Duan Yong-qiang); Wen, DS (Wen De-sheng); Gao, W (Gao Wei); Zheng, PY (Zheng Pei-yun); Zhao, BC (Zhao Bao-chang)
编者: Zarnecki JC; Nardell CA; Shu R; Yang J; Zhang Y
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: SPACE EXPLORATION TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8196  文献号: 819614  DOI: 10.1117/12.900345  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The CCD Stereo Camera is a principal science payload on board the Chang'E-1 (CE-1) satellite, developed and launched by China for the first Lunar Exploration Program. The principal task of the camera is to take image of the lunar surface in the visible band and obtains three-dimensional lunar terrain. The CCD Stereo Camera is designed based on three-linear array photogrammetric theories. The focal plane of the camera is comprised of a frame transfer CCD with size of 1024x1024 pixels. There are only three lines to be used to form a three-linear array, and the other lines are not used. The timing and control circuits of the camera are designed based on FPGA. An Actel's anti-fuse based FPGA, A1020B, is available, but the speed and logical resources of the device both are limited. This paper describes the design requirements, considerations and trade-off subject to the constraints. Especially, A novel logic circuit is introduced to generate the pulses with width of about 10ns similar to 20ns with constraint of 8MHz external clock, which is used to design correlated double sampling (CDS) control signals and CCD reset signal. Finally, the result of flying verifications on-board of the timing and control circuits are also described.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Space Exploration Technologies and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Chinese Lunar Exploration Program; Chang'E-1 satellite; CE-1 satellite; payloads; CCD Stereo Camera; FPGA; three-linear array; timing
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied
研究方向: Engineering; Optics; Physics
IDS 号: BWV64
ISSN: 0277-786X
ISBN: 978-0-81948-837-4
________________________________________
第 37 条,共 81 条
标题: Medium-sized aperture deployable telescope for microsatellite application
作者: Feng, XG (Feng, Xuegui); Li, C (Li, Chuang); Ren, GR (Ren, Guorui)
编者: Zarnecki JC; Nardell CA; Shu R; Yang J; Zhang Y
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: SPACE EXPLORATION TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8196  文献号: 81961V  DOI: 10.1117/12.901038  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: An important research interest on space optics is the ultra-light space telescope technology which is compatible with microsatellite platform. To realize lightweight telescope, one way is to develop deployable telescopes. They not only maintain the capabilities of traditional non-deployable telescopes but also have compacter launch volume and lighter weight and lower cost. We investigate the telescope with accurate deployable structure based on tape springs. Before launch, the secondary mirror support structure with tape springs is folded, and when the satellite is on orbit, the secondary mirror is deployed with the elastic strain energy of folded tape springs. There are mainly three parts in the paper. Firstly, the telescope optics was presented. A Ritchey-Chretien (RC) type optical system with 300mm aperture was designed. The influence of the secondary mirror misalignment on the optical performance was analyzed. Secondly, the deployable telescope structure with tape springs was designed for the RC system. The finite element method (FEM) was used to analysis the dynamics of the unfolded telescope structure. Finally, the deployment precision metering system was discussed.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Space Exploration Technologies and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: deployment; telescope; tape springs
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied
研究方向: Engineering; Optics; Physics
IDS 号: BWV64
ISSN: 0277-786X
ISBN: 978-0-81948-837-4
________________________________________
第 38 条,共 81 条
标题: Design and application of TEC controller Using in CCD camera
作者: Gan, YQ (Gan Yu-quan); Ge, W (Ge Wei); Qiao, WD (Qiao Wei-dong); Lu, D (Lu Di); Lv, J (Lv Juan)
编者: Zarnecki JC; Nardell CA; Shu R; Yang J; Zhang Y
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: SPACE EXPLORATION TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8196  文献号: 81961E  DOI: 10.1117/12.900697  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Thermoelectric cooler (TEC) is a kind of solid hot pump performed with Peltier effect. And it is small, light and noiseless. The cooling quantity is proportional to the TEC working current when the temperature difference between the hot side and the cold side keeps stable. The heating quantity and cooling quantity can be controlled by changing the value and direction of current of two sides of TEC. So, thermoelectric cooling technology is the best way to cool CCD device. The E2V's scientific image sensor CCD47-20 integrates TEC and CCD together. This package makes easier of electrical design. Software and hardware system of TEC controller are designed with CCD47-20 which is packaged with integral solid-state Peltier cooler. For hardware system, 80C51 MCU is used as CPU, 8-bit ADC and 8-bit DAC compose of closed-loop controlled system. Controlled quantity can be computed by sampling the temperature from thermistor in CCD. TEC is drove by MOSFET which consists of constant current driving circuit. For software system, advanced controlled precision and convergence speed of TEC system can be gotten by using PID controlled algorithm and tuning proportional, integral and differential coefficient. The result shows: if the heat emission of the hot side of TEC is good enough to keep the temperature stable, and when the sampling frequency is 2 seconds, temperature controlled velocity is 5 degrees C/min. And temperature difference can reach -40 degrees C controlled precision can achieve 0.3 degrees C. When the hot side temperature is stable at 25 degrees C, CCD temperature can reach -23 degrees C, and thermal noise of CCD is less than 1e-/pix/s. The controlled system restricts the dark-current noise of CCD and increases SNR of the camera system.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Space Exploration Technologies and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Thermoelectric cooler; PID control; Dark current; SNR
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied
研究方向: Engineering; Optics; Physics
IDS 号: BWV64
ISSN: 0277-786X
ISBN: 978-0-81948-837-4
________________________________________
第 39 条,共 81 条
标题: Development of low readout noise scientific CCD camera for lunar astronomical observation
作者: Ge, W (Ge Wei); Gan, YQ (Gan Yu-quan); Wang, H (Wang Hong); Xu, GZ (Xu Guang-zhou)
编者: Zarnecki JC; Nardell CA; Shu R; Yang J; Zhang Y
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: SPACE EXPLORATION TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8196  文献号: 81961D  DOI: 10.1117/12.900695  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: High sensitivity and SNR are requested in lunar astronomical observation in order to get dark and feeble objects. Scientific CCD Cameras used in lunar astronomical observation usually have following characteristics: high quantum efficiency, wide spectral response, good photometric linearity and wide dynamic range. However, extremely low readout noise is usually a key indicator of the camera. A CCD camera, based on E2V's back-illuminated ultraviolet-enhanced scientific grade AIMO image sensor, has been designed for lunar astronomical observation. Four major kinds of electrical optimal design are presented in order to reduce the readout noise of the camera. The experiment result shows that: in the 200K pix/s of the pixel clock, the camera system gain is 1.83e-/ADU, and the readout noise is less than 6e-.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Space Exploration Technologies and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Scientific CCD camera; Lunar astronomical observation; Readout noise; System gain
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied
研究方向: Engineering; Optics; Physics
IDS 号: BWV64
ISSN: 0277-786X
ISBN: 978-0-81948-837-4
________________________________________
第 40 条,共 81 条
标题: Application of carbon-carbon composite for load-carrying cylinder in lunar optical telescope
作者: Li, F (Li, Fu); Ruan, P (Ruan, Ping); Li, T (Li, Ting); Xu, GZ (Xu, Guang-zhou); Lu, D (Lu, Di); Pan, HJ (Pan, Hai-jun)
编者: Zarnecki JC; Nardell CA; Shu R; Yang J; Zhang Y
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: SPACE EXPLORATION TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8196  文献号: 81961G  DOI: 10.1117/12.900738  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The carbon-carbon composite (CCC) was applied in order to design and fabricate much more predominant lunar optical telescope (LOT). The fabricating technics of CCC and machining technics of load-carrying cylinder assembly are introduced. The density of CCC is 1.73g/cm(3), and the coefficient of thermal expansion is 0.5 x 10(-6)/degrees C. The thermal adaptability of LOT was analyzed, the operating temperature of LOT will be improved to -20 degrees C similar to +40 degrees C. that the carbon-carbon cylinder is used. Finite element analysis of LOT with CCC cylinder was performed, and the results show that the first frequency of LOT is 185Hz. The machining and assembling of LOT have been performed. The vibration testing has been accomplished and the testing results are consistent with finite element analysis. The testing results show that load-carrying cylinder of CCC can stand the mechanical proof. All analysis and testing indicate that CCC can be competent for LOT.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Space Exploration Technologies and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Carbon-carbon composite (CCC); Load-carrying cylinder; Lunar optical telescope ( LOT); Finite element analysis; Vibration testing
KeyWords Plus: CARBON/CARBON
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied
研究方向: Engineering; Optics; Physics
IDS 号: BWV64
ISSN: 0277-786X
ISBN: 978-0-81948-837-4
________________________________________
第 41 条,共 81 条
标题: Progress of NUV and FUV MCP-based photon-counting imaging detectors
作者: Liu, YA (Liu Yong-an); Zhao, BS (Zhao Bao-sheng); Wei, YL (Wei Yong-lin); Sai, XF (Sai Xiao-feng); Yan, QR (Yan Qiu-rong); Sheng, LZ (Sheng Li-zhi)
编者: Zarnecki JC; Nardell CA; Shu R; Yang J; Zhang Y
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: SPACE EXPLORATION TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8196  文献号: 81961M  DOI: 10.1117/12.900916  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In the World Space Observatory-Ultraviolet (WSO-UV) mission, the Long Slit Spectrograph (LSS) instrument will provide low resolution spectra in the range 102-320nm. Both the NUV (160-320nm) and the FUV (102-170nm) channels of LSS use microchannel plates (MCP) working in photon-counting modes as detectors. In this paper, the progress and parameters of NUV and FUV photon-counting imaging detectors were described. For the NUV detector, we developed the detector based on a sealed MCP-image intensifier which comprises input window, photocathode, MCP stack, Ge-layer and its ceramic substrate. To maximize the quantum efficiency, we adopted a Caesium Telluride (Cs2Te) photocathode, which was deposited on input window and mounted close to the MCP. For the FUV detector, because of the lower cut-off wavelength, there are no suitable window materials in this band and the open-faced design should be used to meet the requirements of the detection. Therefore, a Caesium Iodide (CsI) photocathode deposited on the input surface of the MCP was used to optimize detector efficiency. By using an existing wedge and strip anode (WSA), the imaging performance of the NUV and FUV detectors was tested respectively. Experimental results show that the quantum efficiency of Cs2Te is 12.1% (at 230 nm), the spatial resolution of NUV and FUV detectors is better than 110 mu m, the dark count rate of NUV and FUV detectors is about 10.5-and 2.3-counts/s(*)cm(2) respectively.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Space Exploration Technologies and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Detectors; Photon-counting imaging; WSO-UV; Ultraviolet; MCP
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied
研究方向: Engineering; Optics; Physics
IDS 号: BWV64
ISSN: 0277-786X
ISBN: 978-0-81948-837-4
________________________________________
第 42 条,共 81 条
标题: Thermal optimum design for tracking primary mirror of Space Telescope
作者: Pan, HJ (Pan Hai-jun); Ruan, P (Ruan Ping); Li, F (Li Fu); Wang, HW (Wang Hong-Wei)
编者: Zarnecki JC; Nardell CA; Shu R; Yang J; Zhang Y
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: SPACE EXPLORATION TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8196  文献号: 81960M  DOI: 10.1117/12.899606  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In the conventional method, the structural parameters of primary mirror are usually optimized just by the requirement of mechanical performance. Because the influences of structural parameters on thermal stability are not taken fully into account in this simple method, the lightweight optimum design of primary mirror usually brings the bad thermal stability, especially in the complex environment. In order to obtain better thermal stability, a new method about structure-thermal optimum design of tracking primary mirror is discussed. During the optimum process, both the lightweight ratio and thermal stability will be taken into account. The structure-thermal optimum is introduced into the analysis process and commenced after lightweight design as the secondary optimum. Using the engineering analysis of software ANSYS, a parameter finite element analysis (FEA) model of mirror is built. On the premise of appropriate lightweight ratio, the RMS of structure-thermal deformation of mirror surface and lightweight ratio are assigned to be state variables, and the maximal RMS of temperature gradient load to be object variable. The results show that certain structural parameters of tracking primary mirror have different influences on mechanical performance and thermal stability, even they are opposite. By structure-thermal optimizing, the optimized mirror model discussed in this paper has better thermal stability than the old one under the same thermal loads, which can drastically reduce difficulty in thermal control.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Space Exploration Technologies and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: tracking primary mirror; secondary optimum; thermal deformation; thermal design
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied
研究方向: Engineering; Optics; Physics
IDS 号: BWV64
ISSN: 0277-786X
ISBN: 978-0-81948-837-4
________________________________________
第 43 条,共 81 条
标题: Compact equivalent-circuit model of LiNbO3 modulator for passive millimeter wave imaging system
作者: Qian, FC (Qian Feng-chen); Xie, XP (Xie Xiao-ping); Ye, YL (Ye Ya-lin)
编者: Zarnecki JC; Nardell CA; Shu R; Yang J; Zhang Y
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: SPACE EXPLORATION TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8196  文献号: 81961L  DOI: 10.1117/12.900869  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: This paper presents a compact frequency-independent equivalent-circuit model for mmW characteristics of lithium niobate (LiNbO3) optical modulator, taking the skin effect, and substrate effect into consideration. Equivalent-circuit model with only ideal lumped elements represents the broadband electrical response of LiNbO3 modulator. A 4-long ladder model is used to model the skin effect. Coupling capacitor is used to simulate the substrate coupling from the CPW to the buffer and LiNbO3 substrate. Lumped-element circuit model was cascaded to model the distributive skin effect, transmission attenuation, and substrate effect. The equivalent-circuit models are fully SPICE compatible and can be incorporated directly into common circuit simulators and microwave design tools.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Space Exploration Technologies and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Equivalent circuit; coplanar waveguide; LiNbO3 modulator; shin effect; lumped elements; substrate effect
KeyWords Plus: LINES
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied
研究方向: Engineering; Optics; Physics
IDS 号: BWV64
ISSN: 0277-786X
ISBN: 978-0-81948-837-4
________________________________________
第 44 条,共 81 条
标题: Temporal Resolution of X-ray Detector for Pulsar Navigation
作者: Sheng, LZ (Sheng Li-zhi); Zhao, BS (Zhao Bao-sheng); Hu, HJ (Hu Hui-jun); Wang, P (Wang Peng); Yan, QR (Yan Qiu-rong); Chen, BM (Chen Bao-mei); Liu, YA (Liu Yong-an); OuYang, XP (OuYang Xiao-ping); Chen, D (Chen Ding)
编者: Zarnecki JC; Nardell CA; Shu R; Yang J; Zhang Y
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: SPACE EXPLORATION TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8196  文献号: 81961C  DOI: 10.1117/12.900678  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: Pulsar navigation is a promising new technique for space exploration because of its autonomous and deep space capability. Since the baseline of pulsar navigation approach is to observe the X rays (0.2 similar to 20keV) emitted from pulsars, a compact high temporal resolution X-ray detector is needed. In this paper an micro-channel plate(MCP) photon counting detector sensitive to X-rays is proposed. The detection system consists of a CsI photocathode, a 50mm diameter micro-channel plate (MCP) stack, a collection anode, a preamplifier, a constant fraction discriminator(CFD) and data acquisition(DAQ). The incident X-rays photons are absorbed by CsI and converted to photoelectrons, the electrons are multiplied by MCP and collected by the anode. Anode output signal is a fast pulse which need to be amplified by preamplifier and then fed to CFD circuit and DAQ for a precise timing. The total temporal resolution(Delta T) of the entire detection system could be determined by Delta t(D), the intrinsic temporal resolution of cathode-MCP-anode, and Delta t(E) the resolution of electronic system including preamplifier and CFD. The resolution of the detection system is tested to be 18.4ns in experiment.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Space Exploration Technologies and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: X-ray detector; pulsar navigation; temporal resolution
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied
研究方向: Engineering; Optics; Physics
IDS 号: BWV64
ISSN: 0277-786X
ISBN: 978-0-81948-837-4
________________________________________
第 45 条,共 81 条
标题: A comparative study on model-based pose estimation of flying objects with different feature descriptors
作者: Tang, HJ (Tang Hui-jun); Wen, J (Wen Jia); Ma, CW (Ma Cai-wen); Zhou, RK (Zhou Ren-kui)
编者: Zarnecki JC; Nardell CA; Shu R; Yang J; Zhang Y
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: SPACE EXPLORATION TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8196  文献号: 81961P  DOI: 10.1117/12.900949  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Methods for pose estimation of flying objects are introduced. Among them is the model-based optical method. We focus on the feature description aspect in model-based method. Feature descriptors of chain codes, moments, Fourier descriptors are used for 2D silhouette or region description. Common issues and techniques, particularly representation and normalization, of such three kinds of descriptors in the application of model-based pose estimation are analyzed. We build a Matlab pose estimation framework to compare pose estimation procedures using different feature descriptors. A missile model of MilkShape 3D file format is created as the simulation object. Experiments concerning with the abilities of descriptors are proceeded to show the difference of these descriptors.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Space Exploration Technologies and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: model-based; pose estimation; feature descriptors; chain codes; moments; Fourier descriptors; normalization
KeyWords Plus: 3-DIMENSIONAL OBJECTS; FOURIER DESCRIPTORS; IDENTIFICATION
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied
研究方向: Engineering; Optics; Physics
IDS 号: BWV64
ISSN: 0277-786X
ISBN: 978-0-81948-837-4
________________________________________
第 46 条,共 81 条
标题: The research of the high precision universal stable reconnaissance platform in near space
作者: Yang, HT (Yang Hong-tao); Cao, JZ (Cao Jian-zhong); Fan, ZY (Fan Zhe-yuan); Chen, WN (Chen Wei-ning)
编者: Zarnecki JC; Nardell CA; Shu R; Yang J; Zhang Y
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: SPACE EXPLORATION TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8196  文献号: 819611  DOI: 10.1117/12.900298  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The appliance of military was recognized more and more, It is important that pod can bear the weight of the availability payload achieve the observation to the earth in 20km-100km area and work in the all-weather. The stable platform can load high imaging spectrometer the thermal infrared imager. the infrared radiometer. the millimeter waves radar. the laser weapon and so on, in order to realize reconnaissance and attacking integrative and warning the long-distant missile. The stabilization accuracy of platform is prior to 20 mu rad and burden heavy load to the best of one's abilities. It used high precision velocity and acceleration gyroscope to fulfill the stabilization of the platform. Light-weight design by using new composite material and optimizing design. It was adapt to the near space environment better by structure design and simulation analysis. Enhance its basic frequency and sure the rigid of the frame platform. In addition, the structure of platform apply the two-axis and four-frame and use the method of FEA to fulfill the optimum design in order to attain the object of light-weight. In consider to the precision of the platform I establish the math model and make use of the monte carlo method to appraise and analysis the error that affect the precision of the platform. After emulating by the software of the Matlab to verify the results. It is apply the method that link the platform and aerocraft by mounting the no angular displacement shock absorbers on the elevator mechanism. This kind of design insulate the angular vibration and minish the linear vibration to ensure the image quality.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Space Exploration Technologies and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Near space; Stable platform; Payload; Light-weight design; stabilization accuracy
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied
研究方向: Engineering; Optics; Physics
IDS 号: BWV64
ISSN: 0277-786X
ISBN: 978-0-81948-837-4
________________________________________
第 47 条,共 81 条
标题: Three Mirror Anastigmatic Zoom System Using Deformable Mirrors
作者: Zhao, X (Zhao Xin); Xie, YJ (Xie Yong-jun)
编者: Zarnecki JC; Nardell CA; Shu R; Yang J; Zhang Y
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: SPACE EXPLORATION TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8196  文献号: 81961F  DOI: 10.1117/12.900730  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In order to optically vary the effect focal length of optical zoom system, adds two or more active optics which could supply variable the focal length, and create an imaging system with variable optical magnification that has no macroscopic moving parts. Based on this design concept, and connected with off-axis three-mirror reflective optical system design, we have presented preliminary modeling showing that active optical elements can be used as to create a zoom system that the effective focal length from 1000 mm to 3000 mm in ZEMAX, the FOV(Field of view) is 16 degrees x 2 degrees - 6.87 degrees x 0.86 degrees, and the F/# is 5-15, the whole system is composed of 3 reflective mirrors(DM, Deformable Mirrors). In order to zoom system, the F/# and three reflective mirror's radius, were variable. The MTF more than 0.45 at the spatial frequency of 421p/mm and approaches the diffraction limit, the maximum RMS spot diameter less than detector's size. The results show that the imaging quality can satisfy the requirement of the system.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Space Exploration Technologies and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Three mirrors; Deformable mirrors; Zoom systems
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied
研究方向: Engineering; Optics; Physics
IDS 号: BWV64
ISSN: 0277-786X
ISBN: 978-0-81948-837-4
________________________________________
第 48 条,共 81 条
标题: Probability of acquisition of three-dimensional imaging laser radar
作者: Dong, LJ (Dong Li-jun); Zhu, SL (Zhu Shao-lan); Sun, CD (Sun Chuan-dong); Gao, CX (Gao Cun-xiao); Song, ZY (Song Zhi-yuan)
编者: Amzajerdian F; Chen W; Gao C; Xie T
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: LASER SENSING AND IMAGING AND BIOLOGICAL AND MEDICAL APPLICATIONS OF PHOTONICS SENSING AND IMAGING  丛书: Proceedings of SPIE  卷: 8192  文献号: 81924A  DOI: 10.1117/12.901932  子辑: 1  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Three-dimensional imaging laser radar (3-D ladar) is widely used in area of modern military, scientific research, agriculture and industry. Because of its many features such as angle-angle-range capturing, high resolution, anti-jamming ability and no multipath effect, but it has to scan for target searching, acquiring and tracking. This paper presents a novel probability model of target acquiring which provides a theoretical basis for optimizing the scanning mechanism. The model combines space and time, target moving velocity and ladar scanning velocity together. Then the optimum scanning mechanism to obtain the maximum probability of acquisition and associated with different targets can be gained. The result shows that this model provides a method to optimize parameter for designing of the scanner.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Laser Sensing and Imaging and Biological and Medical Applications of Photonics Sensing and Imaging
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: target acquiring; probability of acquisition; Three-dimensional imaging laser radar (3-D ladar); ladar scanning
Web of Science 类别: Optics; Physics, Applied; Radiology, Nuclear Medicine & Medical Imaging
研究方向: Optics; Physics; Radiology, Nuclear Medicine & Medical Imaging
IDS 号: BWV43
ISSN: 0277-786X
ISBN: 978-0-81948-833-6
________________________________________
第 49 条,共 81 条
标题: Applications of digital IF receivers and under-sampling technique in ladar
作者: Song, ZY (Song Zhi-yuan); Zhu, SL (Zhu Shao-lan); Dong, LJ (Dong Li-jun); Feng, L (Feng Li); He, HD (He Hao-dong)
编者: Amzajerdian F; Chen W; Gao C; Xie T
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: LASER SENSING AND IMAGING AND BIOLOGICAL AND MEDICAL APPLICATIONS OF PHOTONICS SENSING AND IMAGING  丛书: Proceedings of SPIE  卷: 8192  文献号: 819249  DOI: 10.1117/12.901928  子辑: 1  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The traditional technique of phase laser range finder is mixing high frequency signals with analog circuits and filtering them to obtain the useful signal with low frequency. But the analog mixing circuits are susceptible to interference and will bring amplitude attenuation, phase jitter and offset and this way has difficulties in achieving high precision ranging and fast speed ranging at the same time. The method of this paper is based on under-sampling technique with digital synchronous detection and referring to Digital down converter technique of digital IF receiver in radar system. This method not only reduces the complexity of data processing, improves the speed and accuracy of phase detection at the same time, but also reduces requirements for ADC devices and DSP chips in the ladar system by a lower sampling rate. At the same time, the structure of electronic system is global simplified compared with traditional analog ladar system and the anti-jamming is greatly enhanced. So this method has important research value.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Laser Sensing and Imaging and Biological and Medical Applications of Photonics Sensing and Imaging
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Ladar; Digital IF receiver; Under-sampling; Digital down-converter
Web of Science 类别: Optics; Physics, Applied; Radiology, Nuclear Medicine & Medical Imaging
研究方向: Optics; Physics; Radiology, Nuclear Medicine & Medical Imaging
IDS 号: BWV43
ISSN: 0277-786X
ISBN: 978-0-81948-833-6
________________________________________
第 50 条,共 81 条
标题: An Improved, Real-time Method for Removing the Cyclic Error of a Homodyne Interferometer
作者: Zhao, SW (Zhao Suwen); Wen, DS (Wen Desheng); Zhu, SL (Zhu Shaolan); Liang, ST (Liang Shitong)
编者: Amzajerdian F; Chen W; Gao C; Xie T
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: LASER SENSING AND IMAGING AND BIOLOGICAL AND MEDICAL APPLICATIONS OF PHOTONICS SENSING AND IMAGING  丛书: Proceedings of SPIE  卷: 8192  文献号: 81924G  DOI: 10.1117/12.902439  子辑: 1  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The nonlinear error of a homodyne interferometer is presented: the amplitudes, the phase and the offsets. An improved compensation method is introduced since the conventional Heydeman modal' calculation is very time-consuming. First, the "zero drift" problem is solved with the polarization phase-shifting technology; second, a fast algorithm based on the Heydeman method is introduced to calculate the errors; and third, electronic circuit is used to remove the nonlinear errors timely. The test result shows that the nonlinearity of the homodyne interferometer could be reduced to sub-nanometer over the measuring range of 20cm, and the accuracy can be improved more than tenfold by the dynamic compensation method.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Laser Sensing and Imaging and Biological and Medical Applications of Photonics Sensing and Imaging
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: single frequency laser interferometer; error correction; real-time compensation; Lissajous figure
KeyWords Plus: OPTICAL INTERFEROMETRY; NONLINEARITY
Web of Science 类别: Optics; Physics, Applied; Radiology, Nuclear Medicine & Medical Imaging
研究方向: Optics; Physics; Radiology, Nuclear Medicine & Medical Imaging
IDS 号: BWV43
ISSN: 0277-786X
ISBN: 978-0-81948-833-6
________________________________________
第 51 条,共 81 条
标题: Numerical Simulation of Terahertz Generation and Detection Based on Ultrafast Photoconductive Antennas
作者: Chen, LC (Chen Long-chao); Fan, WH (Fan Wen-hui)
编者: Zhang XC; Yao J; Zhang C; Wang Z
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: TERAHERTZ WAVE TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8195  文献号: 81950K  DOI: 10.1117/12.900319  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The numerical simulation of terahertz generation and detection in the interaction between femtosecond laser pulse and photoconductive material has been reported in this paper. The simulation model based on the Drude-Lorentz theory is used, and takes into account the phenomena that photo-generated electrons and holes are separated by the external bias field, which is screened by the space-charge field simultaneously. According to the numerical calculation, the terahertz time-domain waveforms and their Fourier-transformed spectra are presented under different conditions. The simulation results indicate that terahertz generation and detection properties of photoconductive antennas are largely influenced by three major factors, including photo-carriers' lifetime, laser pulse width and pump laser power. Finally, a simple model has been applied to simulate the detected terahertz pulses by photoconductive antennas with various photo-carriers' lifetimes, and the results show that the detected terahertz spectra are very different from the spectra radiated from the emitter.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Terahertz Wave Technologies and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Terahertz; photo-carrier; space-charge screening; photoconductive antenna
KeyWords Plus: TEMPERATURE-GROWN GAAS; SEMICONDUCTOR SURFACES; OUTPUT POWER; RADIATION; BEAMS; PHOTOMIXERS; PULSES; LASER
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: BWV62
ISSN: 0277-786X
ISBN: 978-0-81948-836-7
________________________________________
第 52 条,共 81 条
标题: Image enhancement techniques used for THz imaging
作者: Liang, YQ (Liang, Yuqing); Fan, WH (Fan, Wenhui); Xue, B (Xue, Bing)
编者: Zhang XC; Yao J; Zhang C; Wang Z
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: TERAHERTZ WAVE TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8195  文献号: 819515  DOI: 10.1117/12.900775  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Terahertz (THz) radiation has been widely applied in the areas of spectroscopy, sensing and imaging. With the advancement of THz technologies, THz imaging has been progressed significantly and has huge potential applications in medical diagnosis, environmental control, chemical and biological identification. In the past, people mainly focused on overcoming the obstacles in the hardware, such as the limitation of resolution, accuracy and speed in THz imaging system. In this paper, image enhancement techniques are employed to enhance the contrast and get the better profile of THz image. Our results clearly demonstrate that digital image processing techniques can suppress noise effectively, extract target edges robustly, and therefore improve the quality of THz image.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Terahertz Wave Technologies and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: THz; THz imaging; Digital image processing technique
KeyWords Plus: TERAHERTZ RADIATION; TIME; DOMAIN; SPECTROSCOPY
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: BWV62
ISSN: 0277-786X
ISBN: 978-0-81948-836-7
________________________________________
第 53 条,共 81 条
标题: Low-frequency vibrational modes of benzoic acid investigated by terahertz time-domain spectroscopy and theoretical simulations
作者: Yan, H (Yan Hui); Fan, WH (Fan Wen-hui); Zheng, ZP (Zheng Zhuan-ping)
编者: Zhang XC; Yao J; Zhang C; Wang Z
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: TERAHERTZ WAVE TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8195  文献号: 81950L  DOI: 10.1117/12.900322  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In this paper, the low-frequency vibrational modes of crystalline benzoic acid (BA) have been investigated by terahertz time-domain spectroscopy (THz-TDS) and theoretical simulations based on the linearity combination of atomic orbital within the Density Functional Theory (DFT) as well as ab initio molecular orbital method at second-order Moller-Plesset Perturbation Theory (MP2) level for single molecule and dimer. Experimentally, a series of prominent absorption features of pure benzoic acid relevant to intra-and inter-molecular vibrational modes have been obtained below 4 THz at room temperature. For the theoretical simulations, geometry-optimization results of bond lengths and dihedral angles in both BA monomer and dimer are very close to experimental neutron diffraction measurements. Furthermore, the simulation results demonstrate absorption profile centered at 1.89 THz contains low-frequency modes of Ph-COOH twisting due to intramolecular motion and cogwheel owing to intermolecular motion. All the intra-and inter-molecular vibrational modes measured have also been assigned.
文献类型: Proceedings Paper
会议名称: International Symposium on Photoelectronic Detection and Imaging 2011 - Terahertz Wave Technologies and Applications
会议日期: MAY 24-26, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Low-frequency vibrational mode; THz-TDS; DFT; MP2; Benzoic acid
KeyWords Plus: SYSTEMS; SPECTRA
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: BWV62
ISSN: 0277-786X
ISBN: 978-0-81948-836-7
________________________________________
第 54 条,共 81 条
标题: A Review of Super-Resolution Restoration from Image Sequences
作者: Xu, ZG (Xu, Zhigang); Su, XQ (Su, Xiuqin)
编者: Zhang H; Shen G; Jin D
来源出版物: ADVANCED RESEARCH ON INDUSTRY, INFORMATION SYSTEMS AND MATERIAL ENGINEERING, PTS 1-7  丛书: Advanced Materials Research  卷: 204-210  页: 1336-1341  DOI: 10.4028/www.scientific.net/AMR.204-210.1336  子辑: 1-7  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Super-resolution (SR) restoration produces one or a set of high resolution images from low-resolution observations. In particular, SR restoration involves many multidisciplinary studies. A review on recent SR restoration approaches was given in this paper. First, we introduced the characteristics and framework of SR restoration. The state of the art in SR restoration was surveyed by taxonomy. Then we summarized and analyzed the existing algorithms of registration and reconstruction. A comparison of performing differences between these methods would only be valid given. After that we discussed the SR problems of color images and compressed videos. At last, we concluded with some thoughts about future directions.
文献类型: Proceedings Paper
会议名称: International Conference on Industry, Information System and Material Engineering
会议日期: APR 16-17, 2011
会议地点: Guangzhou, PEOPLES R CHINA
作者关键词: Super-resolution; image-restoration; registration; color super-resolution
KeyWords Plus: COMPRESSED VIDEO; SUPER RESOLUTION; RECONSTRUCTION; REGISTRATION
Web of Science 类别: Computer Science, Artificial Intelligence; Computer Science, Information Systems; Engineering, Mechanical; Materials Science, Multidisciplinary
研究方向: Computer Science; Engineering; Materials Science
IDS 号: BVV02
ISSN: 1022-6680
ISBN: 978-3-03785-027-5
________________________________________
第 55 条,共 81 条
标题: Image Quality Evaluation of Light Field Photography
作者: Fu, Q (Fu, Qiang); Zhou, ZL (Zhou, Zhiliang); Yuan, Y (Yuan, Yan); Bin, XL (Bin Xiangli)
编者: Farnand SP; Gaykema F
来源出版物: IMAGE QUALITY AND SYSTEM PERFORMANCE VIII  丛书: Proceedings of SPIE  卷: 7867  文献号: 78670F  DOI: 10.1117/12.872486  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Light field photography captures 4D radiance information of a scene. Digital refocusing and digital correction of aberrations could be done after the photograph is taken. However, capturing 4D light field is costly and tradeoffs between different image quality metrics should be made and evaluated. This paper explores the effects of light field photography on image quality by quantitatively evaluating some basic criteria for an imaging system. A simulation approach was first developed by ray-tracing a designed light field camera. A standard testing chart followed by ISO 12233 was provided as the input scene. A sequence of light field raw images were acquired and processed by light field rendering methods afterwards. Through-focus visual resolution and MTF were calculated and analyzed. As a comparison, the same tests were taken for the same main lens system as the results of conventional photography. An experimental light field system was built up and its performance was tested. This work helps better understanding the pros and cons of light field photography in contrast with conventional imaging methods and perceiving the way to optimize the joint digital-optical design of the system.
文献类型: Proceedings Paper
会议名称: Conference on the Image Quality and System Performance VIII
会议日期: JAN 24-26, 2011
会议地点: San Francisco, CA
作者关键词: light field photography; depth of field; system performance; MTF; ISO 12233
KeyWords Plus: CAMERA
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BVK35
ISSN: 0277-786X
ISBN: 978-0-81948-404-8
________________________________________
第 56 条,共 81 条
标题: Single-Image Super-Resolution Based on Semi-Supervised Learning
作者: Tang, Y (Tang, Yi); Yuan, Y (Yuan, Yuan); Yan, PK (Yan, Pingkun); Li, XL (Li, Xuelong); Pan, XL (Pan, Xiaoli); Li, LQ (Li, Luoqing)
书籍团体作者: IEEE
来源出版物: 2011 FIRST ASIAN CONFERENCE ON PATTERN RECOGNITION (ACPR)  页: 52-56  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 3
被引频次合计: 3
摘要: Supervised learning-based methods are popular in single-image super-resolution (SR), and the underlying idea is to learn a map from input low-resolution (LR) images to target high-resolution (HR) images based on a training set. The generalization of the learned map ensures the well performance of these methods on various test images. However, the universality of these methods weakens their specificity. To enhance the performance of learning-based methods on given test images, a semi-supervised learning-based method is firstly proposed for single-image SR. In particular, test image patches are used to learn a dictionary for defining a test-data-dependent feature space. By using the learned dictionary, all LR training samples can be mapped into the test-data-dependent feature space, which makes the information contained in the training set be understood according to the given SR task. Finally, a regression function defined on the test-data-dependent feature space is learned from the refined training samples for generating SR images. The experimental results show that more details are recovered by the proposed semi-supervised method than its supervised version, which means it is a key to balance the universality and the specificity of a regression function in learning-based SR.
文献类型: Proceedings Paper
会议名称: 1st Asian Conference on Pattern Recognition (ACPR)
会议日期: NOV 28-28, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: single image super-resolution; semi-supervised learning; dictionary learning; the least square regression
KeyWords Plus: RESOLUTION; INTERPOLATION
Web of Science 类别: Computer Science, Artificial Intelligence; Computer Science, Hardware & Architecture
研究方向: Computer Science
IDS 号: BDH72
ISBN: 978-1-4577-0121-4
________________________________________
第 57 条,共 81 条
标题: Target-oriented Shape Modeling with Structure Constraint for Image Segmentation
作者: Zhang, WX (Zhang, Wuxia); Yuan, Y (Yuan, Yuan); Li, XL (Li, Xuelong); Yan, PK (Yan, Pingkun)
书籍团体作者: IEEE
来源出版物: 2011 FIRST ASIAN CONFERENCE ON PATTERN RECOGNITION (ACPR)  页: 194-198  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Image segmentation plays a critical role in medical imaging applications, whereas it is still a challenging problem due to the complex shapes and complicated texture of structures in medical images. Model based methods have been widely used for medical image segmentation as a priori knowledge can be incorporated. Accurate shape prior estimation is one of the major factors affecting the accuracy of model based segmentation methods. This paper proposes a novel statistical shape modeling method, which aims to estimate target-oriented shape prior by applying the constraint from the intrinsic structure of the training shape set. The proposed shape modeling method is incorporated into a deformable model based framework for image segmentation. The experimental results showed that the proposed method can achieve more accurate segmentation compared with other existing methods.
文献类型: Proceedings Paper
会议名称: 1st Asian Conference on Pattern Recognition (ACPR)
会议日期: NOV 28-28, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Image Segmentation; Shape Modeling; Manifold Learning; Manifold Assumption
Web of Science 类别: Computer Science, Artificial Intelligence; Computer Science, Hardware & Architecture
研究方向: Computer Science
IDS 号: BDH72
ISBN: 978-1-4577-0121-4
________________________________________
第 58 条,共 81 条
标题: Utilizing Homotopy for Single Image Superresolution
作者: Lu, XQ (Lu, Xiaoqiang); Yan, PK (Yan, Pingkun); Yuan, Y (Yuan, Yuan); Li, XL (Li, Xuelong); Yuan, HL (Yuan, Haoliang)
书籍团体作者: IEEE
来源出版物: 2011 FIRST ASIAN CONFERENCE ON PATTERN RECOGNITION (ACPR)  页: 316-320  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: Learning an appropriate dictionary is a critical issue for sparse representation based super-resolution algorithms. A good dictionary can well represent an underlying image. In super-resolution algorithms, classical dictionary learning doesn't consider the information of test image which contains the information of the reconstructed image. In this paper, the new dictionary is design for image super-resolution, incorporating both training image patches and test image patches for training. It is important for dictionary learning to adaptively choose the training image patches and test image patches which effectively represent the reconstructed image structures. In the new learning strategy, a homotopy method is applied to choose the parameter that yields a proper balance between the use of training image patches and test image patches. The homotopy method is used to track the homotopy path leading to the solution to the desired problem at the terminal point. Compared with other state-of-the-art learning methods, our algorithm learns an over-complete dictionary by exploiting the information of the given test image and training images. The experimental results show that the proposed method is able to achieve better experimental results in terms of both PSNR and visual perception.
文献类型: Proceedings Paper
会议名称: 1st Asian Conference on Pattern Recognition (ACPR)
会议日期: NOV 28-28, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Superresolution; dictionary learning; homotopy
KeyWords Plus: SPARSE REPRESENTATION; INTERPOLATION; ALGORITHM
Web of Science 类别: Computer Science, Artificial Intelligence; Computer Science, Hardware & Architecture
研究方向: Computer Science
IDS 号: BDH72
ISBN: 978-1-4577-0121-4
________________________________________
第 59 条,共 81 条
标题: Local Adaptive Dictionary Based Image Denoising
作者: Tang, Y (Tang, Yi); Yuan, Y (Yuan, Yuan); Yan, PK (Yan, Pingkun); Li, XL (Li, Xuelong); Zhou, H (Zhou, Hui); Li, LQ (Li, Luoqing)
书籍团体作者: IEEE
来源出版物: 2011 FIRST ASIAN CONFERENCE ON PATTERN RECOGNITION (ACPR)  页: 412-416  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In this paper, the problem of balancing the noise removing and the image details preserving is considered. To remove noise adaptively, local dictionaries and sparse coding techniques are used. For a noised image patch, the local dictionary corresponding to it and the sparse coding technique are used to generate the sparse coding vector of the given patch. Then the noise of the given patch can be removed without any information on noise level by setting all components be zero but preserving largest component of the sparse coding vector. Because too much information on image details are removed with noise by the above process, a local weighted regression is adopted to refine the denoising image with the help of the information on the local geometry structure of noised image. Various experiments have been accomplished and prove our method to be effective in balancing the noise removing and the image details preserving.
文献类型: Proceedings Paper
会议名称: 1st Asian Conference on Pattern Recognition (ACPR)
会议日期: NOV 28-28, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: image denosing; adaptive; sparse coding; local weighted regression
KeyWords Plus: SPARSE REPRESENTATION; LEARNED DICTIONARIES; ALGORITHMS; EDGES
Web of Science 类别: Computer Science, Artificial Intelligence; Computer Science, Hardware & Architecture
研究方向: Computer Science
IDS 号: BDH72
ISBN: 978-1-4577-0121-4
________________________________________
第 60 条,共 81 条
标题: Image Denoising via Weight Regression
作者: Tang, Y (Tang, Yi); Yuan, Y (Yuan, Yuan); Yan, PK (Yan, Pingkun); Li, XL (Li, Xuelong); Zhou, H (Zhou, Hui); Li, LQ (Li, Luoqing)
书籍团体作者: IEEE
来源出版物: 2011 FIRST ASIAN CONFERENCE ON PATTERN RECOGNITION (ACPR)  页: 417-421  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The core of image denoising is making a trade-off between removing noise and preserving details of noised image. To remove noise, the denoising algorithm based on K-SVD is employed in this paper. Though the power of such denoising algorithm has been verified by a mount of experiments, many meaningful details of noised image cannot be well maintained. To preserve details of noised image, therefore, local structure information of noised image which is described by the steering kernel is considered in image denoising. In fact, a weighted regression method where the weights are defined by the steering kernel is used to recover the meaningful details of noised image. Experimental results have shown that more meaningful details of noised image are preserved by the proposed algorithm.
文献类型: Proceedings Paper
会议名称: 1st Asian Conference on Pattern Recognition (ACPR)
会议日期: NOV 28-28, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: image denosing; weight regression; K-svd
KeyWords Plus: LEARNED DICTIONARIES; SPARSE; REPRESENTATIONS; ALGORITHMS; EDGES
Web of Science 类别: Computer Science, Artificial Intelligence; Computer Science, Hardware & Architecture
研究方向: Computer Science
IDS 号: BDH72
ISBN: 978-1-4577-0121-4
________________________________________
第 61 条,共 81 条
标题: Local Learning-Based Image Super-Resolution
作者: Lu, XQ (Lu, Xiaoqiang); Yuan, HL (Yuan, Haoliang); Yuan, Y (Yuan, Yuan); Yan, PK (Yan, Pingkun); Li, LQ (Li, Luoqing); Li, XL (Li, Xuelong)
书籍团体作者: IEEE
来源出版物: 2011 IEEE 13TH INTERNATIONAL WORKSHOP ON MULTIMEDIA SIGNAL PROCESSING (MMSP)  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Local learning algorithm has been widely used in single-frame super-resolution reconstruction algorithm, such as neighbor embedding algorithm [1] and locality preserving constraints algorithm [2]. Neighbor embedding algorithm is based on manifold assumption, which defines that the embedded neighbor patches are contained in a single manifold. While manifold assumption does not always hold. In this paper, we present a novel local learning-based image single-frame SR reconstruction algorithm with kernel ridge regression (KRR). Firstly, Gabor filter is adopted to extract texture information from low-resolution patches as the feature. Secondly, each input low-resolution feature patch utilizes.. nearest neighbor algorithm to generate a local structure. Finally, KRR is employed to learn a map from input low-resolution (LR) feature patches to high-resolution (HR) feature patches in the corresponding local structure. Experimental results show the effectiveness of our method.
文献类型: Proceedings Paper
会议名称: 13th IEEE International Workshop on Multimedia Signal Processing (MMSP)
会议日期: OCT 17-19, 2011
会议地点: Hangzhou, PEOPLES R CHINA
Web of Science 类别: Computer Science, Theory & Methods; Engineering, Electrical & Electronic
研究方向: Computer Science; Engineering
IDS 号: BXZ89
ISBN: 978-1-4577-1434-4
________________________________________
第 62 条,共 81 条
标题: Local Semi-Supervised Regression for Single-Image Super-Resolution
作者: Tang, Y (Tang, Yi); Pan, XL (Pan, Xiaoli); Yuan, Y (Yuan, Yuan); Yan, PK (Yan, Pingkun); Li, LQ (Li, Luoqing); Li, XL (Li, Xuelong)
书籍团体作者: IEEE
来源出版物: 2011 IEEE 13TH INTERNATIONAL WORKSHOP ON MULTIMEDIA SIGNAL PROCESSING (MMSP)  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In this paper, we propose a local semi-supervised learning-based algorithm for single-image super-resolution. Different from most of example-based algorithms, the information of test patches is considered during learning local regression functions which map a low-resolution patch to a high-resolution patch. Localization strategy is generally adopted in single-image super-resolution with nearest neighbor-based algorithms. However, the poor generalization of the nearest neighbor estimation decreases the performance of such algorithms. Though the problem can be fixed by local regression algorithms, the sizes of local training sets are always too small to improve the performance of nearest neighbor-based algorithms significantly. To overcome the difficulty, the semi-supervised regression algorithm is used here. Unlike supervised regression, the information about test samples is considered in semi-supervised regression algorithms, which makes the semi-supervised regression more powerful. Noticing that numerous test patches exist, the performance of nearest neighbor-based algorithms can be further improved by employing a semi-supervised regression algorithm. Experiments verify the effectiveness of the proposed algorithm.
文献类型: Proceedings Paper
会议名称: 13th IEEE International Workshop on Multimedia Signal Processing (MMSP)
会议日期: OCT 17-19, 2011
会议地点: Hangzhou, PEOPLES R CHINA
KeyWords Plus: INTERPOLATION; RESOLUTION
Web of Science 类别: Computer Science, Theory & Methods; Engineering, Electrical & Electronic
研究方向: Computer Science; Engineering
IDS 号: BXZ89
ISBN: 978-1-4577-1434-4
________________________________________
第 63 条,共 81 条
标题: Interferogram Spectrum Reconstruction Using Modern Spectral Estimation
作者: Han, G (Han Gang); Liu, XB (Liu Xue-bin); Hu, BL (Hu Bing-liang); Wang, CL (Wang Cai-ling)
书籍团体作者: IEEE
来源出版物: 2011 INTERNATIONAL CONFERENCE ON ELECTRONICS, COMMUNICATIONS AND CONTROL (ICECC)  页: 2112-2115  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: In this paper, we first discussed basic spectral estimation concepts and algorithms, then pointed out that the conventional spectrum reconstruction algorithm is virtually the same with Blackman-Tukey (BT) algorithm in spectral estimation. Then we use two different method (Auto-Regressive parametric model and eigenvector spectral estimation method) to reconstruct light spectrum from interferogram, and compared the results with conventional method for spectrum reconstruction. From the comparison we concluded that the modern spectrum estimation methods can well be adopted in Fourier Transform (FT) spectrum reconstruction and would perform excellent, especially when to get higher spectrum resolution from a short series of data recorded. Later we discussed the disadvantages and restrictions of the two methods used in the simulation. From these results and discussions, we suggested to implement various new spectral estimation method in FT spectrum reconstruction to get better performance.
文献类型: Proceedings Paper
会议名称: IEEE International Conference on Electronics, Communications and Control (ICECC)
会议日期: SEP 09-11, 2011
会议地点: Ningbo, PEOPLES R CHINA
作者关键词: interferogram spectrum reconstruction; modern spectral estimation; AR model; eigenvector spectral estimation
Web of Science 类别: Automation & Control Systems; Engineering, Electrical & Electronic
研究方向: Automation & Control Systems; Engineering
IDS 号: BYG97
ISBN: 978-1-4577-0321-8
________________________________________
第 64 条,共 81 条
标题: Design and Implementation of Cooling System for Focal Plane Assembly of Observation Camera in Astronomical Satellite
作者: Cheng, P (Cheng Pan); Qu, YS (Qu Youshan); Li, HJ (Li Huijuan); Tan, JH (Tan Jiahai)
书籍团体作者: IEEE
来源出版物: 2011 INTERNATIONAL CONFERENCE ON ELECTRONICS, COMMUNICATIONS AND CONTROL (ICECC)  页: 2615-2619  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In order to observe dim astronomical objects, the imaging sensor of the Astronomical Observation Camera (AOC) in the satellite needs to work at -65 degrees C to suppress its dark current noise. To achieve the low temperature environment, a cooling system on Thermoelectric Cooler (TEC) was designed. The cooling system adopted a Single Chip Microprocessor as its control computing platform and its software used self-adaptive digital PID control algorithm was developed. The data of the real-time temperatures, captured by the acquiring circuits from the temperature sensors which were mounted at the back surface of the imaging sensor, were used to be the input of the selfadaptive digital PID control algorithm, and the output calculated by the algorithm was applied to adjusted the control current of the driver circuit for the TEC, and then the temperature of Focal Plane Assembly (FPA) was cooled down or warmed up to satisfy the working requirements. Experimental results show that the designed system can control the temperature gradient of the FPA less than 1 degrees C and reach its normal working temperature -65 degrees C quickly. Its control accuracy is +/-2 degrees C. The practical experiment results displayed the imaging performance of the FPA was stable and the designed cooling system suppressed the dark current noise effectively to get high Signal-to-Noise Ratio images, and the designed cooling system worked stable.
文献类型: Proceedings Paper
会议名称: IEEE International Conference on Electronics, Communications and Control (ICECC)
会议日期: SEP 09-11, 2011
会议地点: Ningbo, PEOPLES R CHINA
作者关键词: Focal plane assembly; Thermoelectric cooler (TEC); Peliter effect; Digital PID algorithm
Web of Science 类别: Automation & Control Systems; Engineering, Electrical & Electronic
研究方向: Automation & Control Systems; Engineering
IDS 号: BYG97
ISBN: 978-1-4577-0321-8
________________________________________
第 65 条,共 81 条
标题: Fuzzy Logic Controller Design Based on Genetic Algorithm for DC Motor
作者: Liu, CJ (Liu, Chun-juan); Li, BX (Li, Bian-xia); Yang, XX (Yang, Xiao-xu)
书籍团体作者: IEEE
来源出版物: 2011 INTERNATIONAL CONFERENCE ON ELECTRONICS, COMMUNICATIONS AND CONTROL (ICECC)  页: 2662-2665  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: This paper propose a genetic based fuzzy logic controller to regulate the speed of separately excited DC motor. The fuzzy membership function and rules are optimized based on genetic algorithm. The DC motor speed control system is modeled and simulated in MATLAB/SIMULINK. Simulation results show that the optimized fuzzy logic controller not only has no overshoot, minimum settling times and vibrations, but also demonstrate high performance for real-time control over a wide range of operating conditions.
文献类型: Proceedings Paper
会议名称: IEEE International Conference on Electronics, Communications and Control (ICECC)
会议日期: SEP 09-11, 2011
会议地点: Ningbo, PEOPLES R CHINA
作者关键词: DC motor drive; Fuzzy logic controller; Genetic algorithm; Simulation
Web of Science 类别: Automation & Control Systems; Engineering, Electrical & Electronic
研究方向: Automation & Control Systems; Engineering
IDS 号: BYG97
ISBN: 978-1-4577-0321-8
________________________________________
第 66 条,共 81 条
标题: Modulation Transfer Function Online Compensation of Imaging System in Remote Sensing satellite
作者: Li, HJ (Li Huijuan); Qu, YS (Qu Youshan); Cheng, P (Cheng Pan)
书籍团体作者: IEEE
来源出版物: 2011 INTERNATIONAL CONFERENCE ON ELECTRONICS, COMMUNICATIONS AND CONTROL (ICECC)  页: 3821-3824  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: According to the theory of Fourier Optics, an optical remote sensing imaging system is an optical diffraction-limited system and a low-pass filter. CCD or CMOS imaging sensors are low-pass filters as well. Thus, when the optical information of an object or a scene with abundant high-frequency components passes through the remote sensing optical imaging system, the profuse middle-frequency information is attenuated and the rich high-frequency information is lost, which will blur the captured remote sensing images. To solve this problem of the imaging system in the remote sensing satellite, an analog on-line compensating method of the Modulation Transfer Function (MTF) in the imaging system is proposed in this paper. The established method was realized by a hardware analog circuit placed before the A/D converter, which is composed of adjustable low-pass filters with a calculated value of quality factor Q. All the theory analysis, experiment results and application in the remote sensing imaging system of the satellite showed that the proposed method and the realized compensating circuit are capable of improving the MTF of imaging systems and enhancing the middle frequency of blurred video images.
文献类型: Proceedings Paper
会议名称: IEEE International Conference on Electronics, Communications and Control (ICECC)
会议日期: SEP 09-11, 2011
会议地点: Ningbo, PEOPLES R CHINA
作者关键词: Imaging System; MTF; Online Compensation; Image Enhancement
Web of Science 类别: Automation & Control Systems; Engineering, Electrical & Electronic
研究方向: Automation & Control Systems; Engineering
IDS 号: BYG97
ISBN: 978-1-4577-0321-8
________________________________________
第 67 条,共 81 条
标题: Optimization of the High Repetition Rate All-Fiber Two-Stage Ytterbium-Doped Fiber Amplifier
作者: Yun, J (Yun Jian); Gao, CX (Gao Cunxiao); Zhu, SL (Zhu Shaolan); Sun, CD (Sun Chuandong); Dong, LJ (Dong Lijun)
编者: Zhang X; Wai PKA; Ming H
来源出版物: 2011 INTERNATIONAL CONFERENCE ON OPTICAL INSTRUMENTS AND TECHNOLOGY: OPTOELECTRONIC DEVICES AND INTEGRATION  丛书: Proceedings of SPIE  卷: 8198  文献号: 81980X  DOI: 10.1117/12.917087  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Based on the technique of master oscillator power amplifier (MOPA), a two-stage ytterbium-doped fiber amplifier (YDFA) with all-fiber structure is theoretically simulated. The seed signal operating at the wavelength of 1064 nm has the characteristic of high repetition rate (10 MHz), ultrashort pulse duration (10 ps), low signal power input (20 mu W) and single longitudinal mode. The gain (and amplification stimulation emission power) is calculated at the different pump powers and gain fiber lengths of YDFA pumped by 975 nm. In addition, the amplifications at the different signal power inputs (1-25 mu W) are also simulated. The numerical results can be used to optimize the YDFA.
文献类型: Proceedings Paper
会议名称: International Conference on Optical Instruments and Technology - Optoelectronic Devices and Integration
会议日期: NOV 06-09, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Ytterbium-doped fiber amplifier; amplification; simulation; ASE noise
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: BYF15
ISSN: 0277-786X
ISBN: 978-0-81948-839-8
________________________________________
第 68 条,共 81 条
标题: Accurate measuring temperature with infrared thermal imager in the unstable condition of ambient temperature
作者: Wang, J (Wang Jing); Qu, ES (Qu En-shi); Cao, JZ (Cao Jian-zhong)
编者: Dong X; Bao X; Shum PP; Liu T
来源出版物: 2011 INTERNATIONAL CONFERENCE ON OPTICAL INSTRUMENTS AND TECHNOLOGY: OPTOELECTRONIC MEASUREMENT TECHNOLOGY AND SYSTEMS  丛书: Proceedings of SPIE  卷: 8201  文献号: 82011T  DOI: 10.1117/12.906280  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The infrared thermal imaging systems are widely used for distinguishing target radiation temperature difference and they can also be used to measure the absolute temperature of the target. There may be great difference between the true value and the measurement results in the actual application of the infrared thermal imaging systems, just because of the unstable condition and the lack of compensation of the imager's own heat radiation. In order to obtain the accurate temperature of the target in some special conditions, such as aircraft internal and pilotless platform, we present a stationary infrared thermal imaging system to gather the goal gradation images and a method to compensate the influence of the imager's own heat radiation and the unstable condition. In radiation calibration experiment, we establish corresponding relationships between the gradation difference and the temperature difference by using a goal blackbody and a cooperation calibration blackbody between 0 degrees C and 150 degrees C. We also analysis the relationships mentioned above under the normal temperature and the high temperature separately. The results show that the proposed method may be useful in increasing the temperature measurement precision.
文献类型: Proceedings Paper
会议名称: International Conference on Optical Instruments and Technology (OIT) - Optoelectronic Measurement Technology and Systems
会议日期: NOV 06-09, 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: infrared thermal imaging system; temperature measurement; blackbody; unstable condition
Web of Science 类别: Instruments & Instrumentation; Optics
研究方向: Instruments & Instrumentation; Optics
IDS 号: BYH42
ISSN: 0277-786X
ISBN: 978-0-81948-842-8
________________________________________
第 69 条,共 81 条
标题: Optical Focusing by Planar Lenses Based on Nano-scale Metallic Slits in Visible Regime
作者: Feng, D (Feng, Di); Zhang, CX (Zhang, Chunxi)
编者: Lee G
来源出版物: 2011 INTERNATIONAL CONFERENCE ON PHYSICS SCIENCE AND TECHNOLOGY (ICPST)  丛书: Physics Procedia  卷: 22  页: 428-434  DOI: 10.1016/j.phpro.2011.11.067  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: A kind of planar metallic lenses is proposed to realize optical focusing in the visible wavelength through a metallic film with nano-scale slit arrays, which have the same depth but tuning widths. Due to the subwavelength and aperiodic nature of planar metallic lenses, we present the rigorous electromagnetic analysis by using two dimensional finite difference time domain method. The electromagnetic wave transports through the tuning slits in the form of surface plasmon polaritons, and gets the required phase retardations to focusing at the focal plane. We analyze the focusing characteristics of planar dielectric lens and metallic lens with tuning widths that are obtained by generalizing the relevant phase delay, for different incidence polarization waves (TM polarized case and TE polarized case). The computational calculation results show that, extraordinary optical transmission of surface plasmon polaritions through non uniform nano-scale metallic slits is observed, and it has contributions to the optical focusing, but cannot increase the focal energy compared with dielectric planar lens with the same profile, and the metallic lenses are more sensitive to the polarization of incidence wave than that of dielectric lenses. The influence of metallic lenses' thickness on the focal characteristics has been analyzed also. (C) 2011 Published by Elsevier B.V. Selection and/or peer-review under responsibility of Garry Lee.
文献类型: Proceedings Paper
会议名称: International Conference on Physics Science and Technology (ICPST)
会议日期: DEC 12-13, 2011
会议地点: Hong Kong, PEOPLES R CHINA
作者关键词: Subwavelength structures; Surface plasmons; Planar metallic lenses; Optical focusing
KeyWords Plus: SUBWAVELENGTH HOLE ARRAYS; NEAR-FIELD; TRANSMISSION
Web of Science 类别: Physics, Applied
研究方向: Physics
IDS 号: BYH83
ISSN: 1875-3892
________________________________________
第 70 条,共 81 条
标题: Detection and Correction of Linear Phase Error for Fourier Transform Spectrometer using Phase Correction Method
作者: Wang, CL (Wang, Cailing); Li, YS (Li, Yushan); Liu, XB (Liu, Xuebin); Hu, BL (Hu, Bingliang); Liu, CF (Liu, Caifang)
编者: Zhang H; Shen G; Jin D
来源出版物: ADVANCED RESEARCH ON AUTOMATION, COMMUNICATION, ARCHITECTONICS AND MATERIALS, PTS 1 AND 2  丛书: Advanced Materials Research  卷: 225-226  期: 1-2  页: 293-296  DOI: 10.4028/www.scientific.net/AMR.225-226.293  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Idealy, an interferogram is an even function of the path differences; it suffices to computer the cosine Fourier transform of the interferogram from the zero optical path to the max to produce the spectrum. However, the interferogram is always asymmetry of the scanning function in reality. A method for the phase correction of interferograms in Fourier transform is presented. It is shown that phase error can be canceled to within an arbitrary angular precision by phase correction method. Three original spectrums are provided in which phase correction over a frequency range of 400nm to 1000nm,they are shown that using Phase Correction Method resulted in a error is less than those of the Mertz Method, and the purchased time is much less than the Mertz Method. The method can be used in most experiments, including emission spectroscopy, where conventional techniques are inadequate.
文献类型: Proceedings Paper
会议名称: International Conference on Automation, Communication, Architectonics and Materials
会议日期: JUN 18-19, 2011
会议地点: Wuhan, PEOPLES R CHINA
作者关键词: Fourier Transform spectrometer; Phase Correction; Mertz method; Phase Correlation
Web of Science 类别: Automation & Control Systems; Computer Science, Hardware & Architecture; Materials Science, Multidisciplinary
研究方向: Automation & Control Systems; Computer Science; Materials Science
IDS 号: BVM73
ISSN: 1022-6680
ISBN: 978-3-03785-103-6
________________________________________
第 71 条,共 81 条
标题: Design Of High Ratio Middle Infrared Continuous Zoom Optical System
作者: Fan, ZY (Fan Zheyuan); Cao, JZ (Cao Jianzhong); Yang, HT (Yang Hongtao); Qu, ES (Qu Enshi); Wu, DS (Wu Dengshan)
编者: Puschell JJ; Chu J; Gong H; Lu J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: ADVANCES IN INFRARED IMAGING AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8193  文献号: 81931R  DOI: 10.1117/12.900176  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: In recent years, the demand for infrared zoom systems is increasing in proportion with the development of infrared technology and its applications. To meet this demand a variety of zoom lenses have been designed. Infrared cameras operating in the 3-5 mu m spectral band are used in a wide variety of applications such as targeting, rescue, guidance and surveillance systems as well as other equipment. This paper using cool 320x240 detector with staring focal plane array and secondary imaging, a mid-wave optical system using mechanical-compensated with large-aperture and a zoom range of 10: 1 is designed. The Pixel Dimensions of the detector is 30 mu m, and the wavelength between 3.7 mu m similar to 4.8 mu m. The system adopts negative group variable times and positive group of compensation which can realize 33mm similar to 330mm continuous zoom and FOV = 20.61 degrees similar to 2.08 degrees, it consists of 7 lenses including 3 aspheric surface. The length of the system is 262mm with the reflection mirror multipass optical path. The results show that the modulation transfer function(MTF) are above 0.4 within the whole focal range at spatial frequency of 17 lp/mm, and Root Mean Square (RMS) value of spot diameter were smaller than the Pixel Dimensions. After the image quality being optimized, the narcissus analysis is done and 100% cold shield efficiency is obtained. Finallythe monotonic and smooth Cam curve is given. The curve shows that the imaging plane is stable and the cam is easy to process. The system has advantages of simple structure, high image quality and short zoom path etc.
文献类型: Proceedings Paper
会议名称: 4th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Advances in Infrared Imaging and Applications
会议日期: 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: continuous zoom; secondary imaging; cold shield efficiency; cam curves
KeyWords Plus: ATHERMALIZATION
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BXX97
ISSN: 0277-786X
ISBN: 978-0-81948-834-3
________________________________________
第 72 条,共 81 条
标题: Design of Catadioptric Middle Infrared Continuous Zoom Lens for Uncooled Infrared Detector
作者: Jiang, K (Jiang Kai); Zhou, SZ (Zhou Si-zhong); Duan, J (Duan Jing); Wang, YB (Wang Yan-bin); Zhang, HJ (Zhang Heng-jin)
编者: Puschell JJ; Chu J; Gong H; Lu J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2011: ADVANCES IN INFRARED IMAGING AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8193  文献号: 81931U  DOI: 10.1117/12.900193  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: For uncooled 320x240 infrared detector, a catadioptric middle infrared continuous zoom lens is presented. The optical system is divided into three segments. First of all, a reflective system is designed as the front system. Then the continuous zoom lens which matches with the reflective system as the back system is designed. The conversed back system is assembled at the first imaging of the optical system with the reflective system. A continuous variable magnification catadiootric telescope is obtained. Projection objective is designed based on the telescope lastly. To ensure the imaging quality of the system, the whole system is optimized with the CODE V software. The system can realize 200mm similar to 800mm continuous zoom. The designed result shows the system has the advantages of simple structure, short zoom path and smooth zoom locus, high image quality and approached or reached to the diffraction limit.
文献类型: Proceedings Paper
会议名称: 4th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Advances in Infrared Imaging and Applications
会议日期: 2011
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Infrared; Catadioptric; Continuous zoom; Optical design
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BXX97
ISSN: 0277-786X
ISBN: 978-0-81948-834-3
________________________________________
第 73 条,共 81 条
标题: Self-adaptive threshold tracking algorithm of Infrared Weak-Small Targets
作者: Xu, ZH (Xu, Zhaohui); Zhang, YK (Zhang, Yongkang); Tian, Y (Tian, Yan); Tang, HJ (Tang, Huijun); Wei, JX (Wei, Junxia)
编者: Zhang T; Sang N
来源出版物: MIPPR 2011: AUTOMATIC TARGET RECOGNITION AND IMAGE ANALYSIS  丛书: Proceedings of SPIE  卷: 8003  文献号: 80030L  DOI: 10.1117/12.901208  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: To detect IWST, foreign and domestic scholars put forward many meaningful detection methods. However, most of the algorithms are too much complex in the calculation to meet real-time and reliability requirements in practical application. A simple self-adaptive threshold algorithm to capture and track the IWST is presented in this paper. Testing results showed that algorithm not only effectively extract IWST and track it through the clouds in the sky background, but also has a strong robustness for the interference of background noises.
文献类型: Proceedings Paper
会议名称: 7th Symposium on Multispectral Image Processing and Pattern Recognition (MIPPR) - Automatic Target Recognition and Image Analysis
会议日期: NOV 04-06, 2011
会议地点: Guilin, PEOPLES R CHINA
作者关键词: Infrared Weak-Small Targets; Self-adaptive threshold; Video tracking; Real time
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Imaging Science & Photographic Technology
研究方向: Engineering; Optics; Imaging Science & Photographic Technology
IDS 号: BYC11
ISSN: 0277-786X
ISBN: 978-0-81948-577-9
________________________________________
第 74 条,共 81 条
标题: Improved Fourier descriptors in model-based pose estimation
作者: Tang, HJ (Tang Hui-jun); Wen, J (Wen Jia); Ma, CW (Ma Cai-wen); Hu, HB (Hu Hai-bin); Zhou, RK (Zhou Ren-kui)
编者: Roberts J; Ma J
来源出版物: MIPPR 2011: PATTERN RECOGNITION AND COMPUTER VISION  丛书: Proceedings of SPIE  卷: 8004  文献号: 80040M  DOI: 10.1117/12.901770  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We use Fourier descriptors (FD's) to represent shape in model-based pose estimation. Specific invariance and normalization requirements for shape descriptors concerning to pose estimation are proposed. FD's are improved to meet such requirements. Common issues and techniques for such application are focused on. Starting point of the shape contour is fixed to the upper left corner point. Distance pairs instead of edge coordinate pairs recast the shape sequence. Moving average filtering is proceeded to remove the noises of the shape sequence. Shape sequence is re-sampled to make it definite length. FD's amplitude is normalized to the range of 0 to 1. Variance of sequences between observed and library FD's is defined as the shape matching objective function. For simulation, we use a missile model of Milkshape3d format. Results show that by adopting the improved FD's, we can arrive at a pose estimation practically by randomly optimal search of library FD's.
文献类型: Proceedings Paper
会议名称: 7th Symposium on Multispectral Image Processing and Pattern Recognition (MIPPR) - Pattern Recognition and Computer Vision
会议日期: NOV 04-06, 2011
会议地点: Guilin, PEOPLES R CHINA
作者关键词: Fourier descriptors; invariance; normalization; shape matching; optimal search; model-based; pose estimation
Web of Science 类别: Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic; Optics
研究方向: Computer Science; Engineering; Optics
IDS 号: BYC12
ISSN: 0277-786X
ISBN: 978-0-81948-578-6
________________________________________
第 75 条,共 81 条
标题: Extending the depth of field of incoherent imaging system through wave-front coding by using composite phase masks
作者: Zhao, H (Zhao, Hui); Yi, HW (Yi, Hongwei); Li, YC (Li, Yingcai)
编者: Roberts J; Ma J
来源出版物: MIPPR 2011: PATTERN RECOGNITION AND COMPUTER VISION  丛书: Proceedings of SPIE  卷: 8004  文献号: 80040F  DOI: 10.1117/12.900250  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Since 1995 when wave-front coding was first proposed by Dowski and Cathey, this technique has become a powerful tool to extend the DOF (depth of field) of incoherent imaging systems. By introducing a phase mask to the aperture plane, the optical transfer function (OTF) can be made insensitive to defocus and thus the key to this technique lies in the design of suitable phase masks. So far, many phase masks have been proposed to achieve the goal of DOF extension. In this paper, a new kind of phase mask, called composite phase mask, is designed by combining existing phase masks. With the optimized parameters, the composite phase mask can be made even less sensitive to defocus than any single mask. At the same time, as the number of phase masks used to generate one composite phase mask increases, the DOF extension effect can also be changed. Both the simulations and experiments demonstrate the effectiveness of the composite phase masks and the work reported also enriches the phase mask family used to realize the large DOF effect.
文献类型: Proceedings Paper
会议名称: 7th Symposium on Multispectral Image Processing and Pattern Recognition (MIPPR) - Pattern Recognition and Computer Vision
会议日期: NOV 04-06, 2011
会议地点: Guilin, PEOPLES R CHINA
作者关键词: wave-front coding; depth of field; composite phase mask
KeyWords Plus: LOGARITHMIC ASPHERE
Web of Science 类别: Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic; Optics
研究方向: Computer Science; Engineering; Optics
IDS 号: BYC12
ISSN: 0277-786X
ISBN: 978-0-81948-578-6
________________________________________
第 76 条,共 81 条
标题: High-precision Image Motion Measurement Applied for Space Camera Based on Hybrid Opto-digital Joint Transform Correlator
作者: Yi, HW (Yi, Hongwei); Zhao, H (Zhao, Hui); Li, Y (Li, Yingcai)
编者: Liu J; Tian J; Sang H; Ma J
来源出版物: MIPPR 2011: REMOTE SENSING IMAGE PROCESSING, GEOGRAPHIC INFORMATION SYSTEMS, AND OTHER APPLICATIONS  丛书: Proceedings of SPIE  卷: 8006  文献号: 80061X  DOI: 10.1117/12.900508  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Hybrid opto-digital joint transform correlator (HODJTC) is effective for image motion measurement, but it is different from the traditional joint transform correlator (JTC) because it only has one process of optical Fourier transform and the intermediate joint power spectrum (JPS) is directly input to a digital unit to compute the image motion. In original HODJTC, the correlation image is obtained by using a global discrete Fourier transform operator. In fact, the location of cross-correlation peak corresponding to zero image motion is known and the maximum image shift can also be estimated. Thus, the local cross-correlation image can be directly obtained by adopting a local Fourier transform operator instead. With the pixel-level location of cross-correlation peak is obtained, the up-sampling technique is introduced to relocate the peak in even higher accuracy. Both the experiments and simulations demonstrate that the RMS (root-mean-square) error of motion determination can be controlled below 0.05 pixels, which is a very promising result for real application.
文献类型: Proceedings Paper
会议名称: 7th Symposium on Multispectral Image Processing and Pattern Recognition (MIPPR) - Remote Sensing Image Processing, Geographic Information Systems, and Other Applications
会议日期: NOV 04-06, 2011
会议地点: Guilin, PEOPLES R CHINA
作者关键词: hybrid opto-digital joint transform correlator; image motion measurement; up-sampling technique; RMS (root-mean-square) error
KeyWords Plus: RECOGNITION; JTC
Web of Science 类别: Remote Sensing; Optics; Imaging Science & Photographic Technology
研究方向: Remote Sensing; Optics; Imaging Science & Photographic Technology
IDS 号: BYF19
ISSN: 0277-786X
ISBN: 978-0-81948-580-9
________________________________________
第 77 条,共 81 条
标题: Nonlinear characterization of silver nanocrystals incorporated tellurite glasses for fiber development
作者: Zhou, ZG (Zhou, Zhiguang); Tan, WJ (Tan, Wenjiang); Si, JH (Si, Jinhai); Zhan, H (Zhan, Huan); He, JL (He, Jianli); Lin, AX (Lin, Aoxiang)
编者: Pal BP
来源出版物: PASSIVE COMPONENTS AND FIBER-BASED DEVICES VIII  丛书: Proceedings of SPIE  卷: 8307  文献号: 830721  DOI: 10.1117/12.904670  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: To develop high nonlinear optical fibers for all-optical switching applications, 7.5 wt% AgNO3 was incorporated into tellurite glasses with composition of 75TeO(2)-20ZnO-5Na(2)CO(3) (TZN75) under precisely-controlled experimental conditions to form 7.5Ag-TZN75 glass. Surface Plasmon resonance absorption peak of Ag nanocrystals embedded in 7.5Ag-TZN75 glass was found to center at 552 nm. By degenerated four-wave mixing method, the non-resonant nonlinear refractive index, n(2), of 7.5Ag-TZN75 glass was measured to be 7.54x10(-19) m(2).W-1 at 1500 nm, about 3 times of the reference TZN75 glass without any dopant and 27 times of the silicate glasses and fibers, and the response time is about 1 picosecond.
文献类型: Proceedings Paper
会议名称: Conference on Passive Components and Fiber-Based Devices VIII
会议日期: NOV 14-16, 2011
会议地点: Shanghai, PEOPLES R CHINA
作者关键词: Silver nanocrystals; optical nonlinearity; surface plasmon resonance
KeyWords Plus: PARTICLES
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied
研究方向: Engineering; Optics; Physics
IDS 号: BYH43
ISSN: 0277-786X
ISBN: 978-0-81948-955-5
________________________________________
第 78 条,共 81 条
标题: Deployment precision measurement modeling of a deployable space telescope based on tape springs
作者: Li, C (Li, Chuang); Feng, XG (Feng, Xuegui)
编者: Fan KC; Lu RS; Song M
来源出版物: SEVENTH INTERNATIONAL SYMPOSIUM ON PRECISION ENGINEERING MEASUREMENTS AND INSTRUMENTATION  丛书: Proceedings of SPIE  卷: 8321  文献号: 83212R  DOI: 10.1117/12.905134  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Tape springs have many advantages to develop spaced-based deployable systems because of their simple structures, light weights, high stiffness, and the abilities of self-deploy and self-lock. Their applications in deployable space structures make the spaced-based systems fulfill the requirements of light weight and compact launching volume. A new kind of deployable space telescope under research uses tape springs as the support structure of secondary mirror. Before launch, the support structure of secondary mirror is folded, and deployed when on orbit. In order to achieve near diffraction limited imaging quality, the deployment precision must reach the level consistent with the optical compensation system. We designed an accurate measuring system based on position sensitive detectors (PSDs) to measure the deployment precision. The measuring system includes 3 laser diodes, 3 two-dimensional PSDs around the primary mirror of the deployable telescope, and 3 small mirrors around the secondary mirror. The equations linking the PSD readings and the six-degree-of-freedom displacement of the secondary mirror were deduced. With these equations, the deployment errors can be resolved.
文献类型: Proceedings Paper
会议名称: 7th International Symposium on Precision Engineering Measurements and Instrumentation (ISPEMI)
会议日期: AUG 07-11, 2011
会议地点: Lijiang, PEOPLES R CHINA
作者关键词: deployable space telescope; six-degree-of-freedom measurement; position sensitive detector; tape spring
Web of Science 类别: Engineering, Electrical & Electronic; Instruments & Instrumentation; Optics
研究方向: Engineering; Instruments & Instrumentation; Optics
IDS 号: BYF21
ISSN: 0277-786X
ISBN: 978-0-81947-940-2
________________________________________
第 79 条,共 81 条
标题: Strain measurement aided assembly for a CFRP hexapod
作者: Ren, GR (Ren Guorui); Li, C (Li Chuang); Wang, W (Wang Wei); Fan, XW (Fan Xuewu)
编者: Fan KC; Lu RS; Song M
来源出版物: SEVENTH INTERNATIONAL SYMPOSIUM ON PRECISION ENGINEERING MEASUREMENTS AND INSTRUMENTATION  丛书: Proceedings of SPIE  卷: 8321  文献号: 83213O  DOI: 10.1117/12.905366  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In order to mount a space optical telescope with long focal length on a spacecraft for an astronomy observation mission, a carbon fiber reinforced plastic (CFRP) hexapod with titanium alloy brackets was designed and fabricated. Each bracket has a pair of heads and each head has two orthogonal flexures as virtual pivots without clearance to provide flexure mounts. Because of no adjustment parts, slight differences among components and roughly assembly would result in misalignment and asymmetrical stress in the hexapod. The stresses and strains of the CFRP hexapod structure under 1G gravity load were analyzed with finite element method. In order to monitor the assembly stress and provide regulating guidance, strain gauges were stuck centrally on the bottom flexures of each bracket. Comparing the measured strains with the computed values, the low stress assembly of the CFRP hexapod has been accomplished successfully.
文献类型: Proceedings Paper
会议名称: 7th International Symposium on Precision Engineering Measurements and Instrumentation (ISPEMI)
会议日期: AUG 07-11, 2011
会议地点: Lijiang, PEOPLES R CHINA
作者关键词: Hexapod; CFRP (carbon fiber reinforced plastic); low stress assembly; strain measurement
KeyWords Plus: SPACE TELESCOPE; ONBOARD
Web of Science 类别: Engineering, Electrical & Electronic; Instruments & Instrumentation; Optics
研究方向: Engineering; Instruments & Instrumentation; Optics
IDS 号: BYF21
ISSN: 0277-786X
ISBN: 978-0-81947-940-2
________________________________________
第 80 条,共 81 条
标题: Precise Thermal Control of CCD Assembly of Space Optical Remote Sensor
作者: Yang, WG (Yang Wengang); Li, YF (Li Yifan); He, TB (He Tianbing); Bai, Z (Bai Zhe); Zhang, XH (Zhang Xianghui); Wang, YH (Wang Yinghao); Yu, L (Yu Lei); Fu, WC (Fu Weichun); Li, YC (Li Yingcai)
编者: Fan KC; Lu RS; Song M
来源出版物: SEVENTH INTERNATIONAL SYMPOSIUM ON PRECISION ENGINEERING MEASUREMENTS AND INSTRUMENTATION  丛书: Proceedings of SPIE  卷: 8321  文献号:   DOI: 10.1117/12.904832  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: One of the most significant requirements driving CCD assemblies design is the operating temperature. In order to avoid unaccepted dark current, CCD need operate between 7 degrees C and 15 degrees C and temperature gradient across the focal plane should be not greater than 1.0 degrees C. These requirements must be achieved by combining active and passive measures. This paper focuses on the precise thermal control design, analysis and test. Because CCD assemblies include focal electronics and movable precise focalizing parts, thermal control must utilize the integrated method to achieve compatible design. Largely using standard and well-proven technologies, this paper also points out some special techniques used. Based on finite difference method and transient energy equations, thermal model of CCD assemblies were built utilizing thermal software and solved for extreme cases. To validate the design, thermal balance test has been done. Analysis and test results have shown that CCD temperature can be controlled between 7.2 degrees C and 13.5 degrees C and temperature gradient was less than 0.5 degrees C. These jobs could give some guidance and reference for the precise thermal control of CCD assembly of other space optical remote-sensor.
文献类型: Proceedings Paper
会议名称: 7th International Symposium on Precision Engineering Measurements and Instrumentation (ISPEMI)
会议日期: AUG 07-11, 2011
会议地点: Lijiang, PEOPLES R CHINA
作者关键词: CCD; precise thermal control; thermal analysis; thermal balance test; space optical remote sensor
Web of Science 类别: Engineering, Electrical & Electronic; Instruments & Instrumentation; Optics
研究方向: Engineering; Instruments & Instrumentation; Optics
IDS 号: BYF21
ISSN: 0277-786X
ISBN: 978-0-81947-940-2
________________________________________
第 81 条,共 81 条
标题: A new model and improvement on test methods of the readout noise in the CCD camera
作者: Yang, ZT (Yang, Zuoting); Ruan, P (Ruan, Ping); Ge, W (Ge, Wei); Wang, H (Wang, Hong)
编者: Fan KC; Lu RS; Song M
来源出版物: SEVENTH INTERNATIONAL SYMPOSIUM ON PRECISION ENGINEERING MEASUREMENTS AND INSTRUMENTATION  丛书: Proceedings of SPIE  卷: 8321  文献号: 83212O  DOI: 10.1117/12.905128  出版年: 2011 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In this paper, a comprehensive model is developed for the scientific CCD camera readout noise. The readout noise can significantly reduce the ability of weak signal detection and ultimately affects the performance of an image processing approach to some extent. The different readout noise sources in scientific CCD camera are well documented, however, there has been little paper on the development of an all-sided readout noise model about the scientific CCD camera. Based on the proposed model, this paper presents a new test method that is present for choosing the standard section by defining criteria of optimality. The proposed method can get the more accurate readout noise than the test method used by experiment and analysis. Besides, the proposed method is fast and simple and therefore can be fitted in the analysis of data and post-image processing, which have very important application in analysis of the CCD camera other performance indicators.
文献类型: Proceedings Paper
会议名称: 7th International Symposium on Precision Engineering Measurements and Instrumentation (ISPEMI)
会议日期: AUG 07-11, 2011
会议地点: Lijiang, PEOPLES R CHINA
作者关键词: CCD; readout noise; standard section; model; image processing
Web of Science 类别: Engineering, Electrical & Electronic; Instruments & Instrumentation; Optics
研究方向: Engineering; Instruments & Instrumentation; Optics
IDS 号: BYF21
ISSN: 0277-786X
ISBN: 978-0-81947-940-2

 

相关附件
相关文档

实时咨询

问图书馆员:

问学科馆员:

中国科学院西安光学精密机械研究所图书馆