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检索条件"任意字段=Conference on Optoelectronic Imaging and Multimedia Technology IV"

共 163 条记录，以下是1-10 订阅

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GeSn 320 × 256 Focal Plane Array for Silicon-Based Short-wave Infrared imaging

GeSn 320 × 256 Focal Plane Array for Silicon-Based Short-wa...

引用

IEEE International conference on Group iv Photonics

作者： Guoyin Xu Hui Cong Yue Li Zhengjie Wu Fenghe Fu Chi Xu Chunlai Xue Key Laboratory of Optoelectronic Materials and Devices Institute of Semiconductors Chinese Academy of Sciences Beijing China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of Sciences Beijing China

In this work, a high-performance 320×256 focal plane array based on group-iv semiconductors has been manufactured on a Si substrate using Ge0.9Sn0.1 film as absorption material. With the help of the read-out circ... 详细信息

ISBN: (数字)9798331506186

ISBN: (纸本)9798331506193

关键词： Absorption PIN photodiodes Circuits Infrared imaging Detectors Silicon photonics Germanium Photodetectors Substrates

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Propagation Characteristics of Orbital Angular Momentum for Remote imaging 4

Propagation Characteristics of Orbital Angular Momentum for ...

引用

conference on optoelectronic imaging and multimedia technology iv

作者： Lu, Li Sheng, Wen Jiang, Feng Bi, Zengjun Air Force Early Warning Acad Wuhan 430019 Peoples R China

The propagation characteristics of the orbital angular momentum in vortex waves have been studied. The representation of electric multipole radiation filed is derived from the Laugerre-Gaussian beams to electromagneti... 详细信息

ISBN: (纸本)9781510604599;9781510604605

关键词： Propagation Characteristics Orbital Angular Momentum imaging

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Single-pixel hyperspectral imaging 4

Single-pixel hyperspectral imaging

引用

conference on optoelectronic imaging and multimedia technology iv

作者： Suo, Jinli Wang, Yuwang Bian, Liheng Dai, Qionghai Tsinghua Univ Dept Automat Beijing Peoples R China

ISBN: (纸本)9781510604599;9781510604605

Conventional multispectral imaging methods detect photons of a 3D hyperspectral data cube separately either in the spatial or spectral dimension using array detectors, and are thus photon inefficient and spectrum range limited. Besides, they are usually bulky and highly expensive. To address these issues, this paper presents single-pixel multispectral imaging techniques, which are of high sensitivity, wide spectrum range, low cost and light weight. Two mechanisms are proposed, and experimental validation are also reported.

关键词： single pixel imaging computational ghost imaging multispectral imaging

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Experimental Research on Showing Automatic Disappearance Pen Handwriting Based on Spectral imaging technology 4

Experimental Research on Showing Automatic Disappearance Pen...

引用

conference on optoelectronic imaging and multimedia technology iv

作者： Su, Yi Xu, Lei Liu, Ningning Huang, Wei Xu, Xiaojing Natl Police Univ China Shenyang Peoples R China Minist Publ Secur Inst Forens Sci Beijing Peoples R China Peoples Publ Secur Univ China Beijing Peoples R China

ISBN: (纸本)9781510604599;9781510604605

Purpose to find an efficient, non-destructive examining method for showing the disappearing words after writing with automatic disappearance pen. Method Using the imaging spectrometer to show the potential disappearance words on paper surface according to different properties of reflection absorbed by various substances in different bands. Results the disappeared words by using different disappearance pens to write on the same paper or the same disappearance pen to write on different papers, both can get good show results through the use of the spectral imaging examining methods. Conclusion Spectral imaging technology can show the disappearing words after writing by using the automatic disappearance pen.

关键词： spectral imaging disappearance writing show optical properties spectral curves

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Spatial-spectral data redundancy requirement for Fourier ptychographic microscopy 4

Spatial-spectral data redundancy requirement for Fourier pty...

引用

conference on optoelectronic imaging and multimedia technology iv

作者： Sun, Jiasong Zhang, Yuzhen Chen, Qian Zuo, Chao Nanjing Univ Sci & Technol Jiangsu Key Lab Spectral Imaging & Intelligence S Nanjing 210094 Jiangsu Peoples R China

ISBN: (纸本)9781510604599;9781510604605

Fourier ptychographic microscopy (FPM) is a new computational super-resolution approach, which can obtain not only the correct object function, but also the pupil aberration, the LED misalignment, and beyond. Although many state-mixed FPM techniques have been proposed to achieve higher data acquisition efficiency and recovery accuracy in the past few years, little is known that their reconstruction performance highly depends on the data redundancy in both object and frequency domains. In this paper, we explore the spatial and spectrum data redundancy requirements for the FPM recovery process to introduce sampling criteria for the conventional and state-mixed FPM techniques in both object and frequency space.

关键词： Computational imaging Microscopy Phase retrieval Image reconstruction techniques Image processing

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Compressive Full Waveform LiDAR with Low-cost Sensor 4

Compressive Full Waveform LiDAR with Low-cost Sensor

引用

conference on optoelectronic imaging and multimedia technology iv

作者： Yang, Weiyi Ke, Jun Beijing Inst Technol Sch Optoelect Key Lab Photoelect Imaging Technol & Syst Beijing Inst TechnolMinist Educ Beijing Peoples R China

ISBN: (纸本)9781510604599;9781510604605

Full-waveform LiDAR is a method that digitizes the complete waveform of backscattered pulses to obtain range information of multi-targets. To avoid expensive sensors in conventional full-waveform LiDAR system, a new system based on compressive sensing method is presented in this paper. The non-coherent continuous-wave laser is modulated by electro-optical modulator with pseudo-random sequences. A low-bandwidth detector and a low-bandwidth analog-digital converter are used to acquire the returned signal. OMP algorithm is employed to reconstruct the high resolution range information.

关键词： Full waveform LiDAR compressive sensing high resolution

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Design of optoelectronic imaging system with high resolution and large field of view based on dual CMOS 4

Design of optoelectronic imaging system with high resolution...

引用

conference on optoelectronic imaging and multimedia technology iv

作者： Cheng, Hanglin Hao, Qun Hu, Yao Cao, Jie Wang, Shaopu Li, Lin Beijing Inst Technol Sch Optoelect Beijing Key Lab Precis Optoelect Measurement Inst Beijing 100081 Peoples R China

ISBN: (纸本)9781510604599;9781510604605

With the advantages of high resolution, large field of view and compacted size, optoelectronic imaging sensors are widely used in many fields, such as robot's navigation, industrial measurement and remote sensing. Many researchers pay more attention to improve the comprehensive performances of imaging sensors, including large field of view (FOV), high resolution, compact size and high imaging efficiency, etc. One challenge is the tradeoff between high resolution and large field of view simultaneously considering compacted size. In this paper, we propose an optoelectronic imaging system combining the lenses of short focal length and long focal length based on dual CMOS to simulate the characters of human eyes which observe object within large FOV in high resolution. We design and optimize the two lens, the lens of short focal length is used to search object in a wide field and the long one is responsible for high resolution imaging of the target area. Based on a micro-CMOS imaging sensor with low voltage differential transmission technology-MIPI (Mobile Industry Processor Interface), we design the corresponding circuits to realize collecting optical information with high speed. The advantage of the interface is to help decreasing power consumption, improving transmission efficiency and achieving compacted size of imaging sensor. Meanwhile, we carried out simulations and experiments to testify the optoelectronic imaging system. The results show that the proposed method is helpful to improve the comprehensive performances of optoelectronic imaging sensors.

关键词： optoelectronic imaging system Optical design Circuit design MIPI technology

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Calculation of overlapping pixels for optical-butting focal plane 4

Calculation of overlapping pixels for optical-butting focal ...

引用

conference on optoelectronic imaging and multimedia technology iv

作者： Li, Fuqiang Chang, Junlei Chu, Bei Li, Na Beijing Inst Space Mech & Elect Beijing 100094 Peoples R China

ISBN: (纸本)9781510604599;9781510604605

The resolution and observing width of optical remote sensing camera can be enhanced by increasing the detector length of focal plane. Optical butting is used to increase the imaging length owing to its simple structure, low cost and the simultaneously-imaging detectors. But butting process is influenced by many factors, which result in imaging gaps, so overlapping pixels between adjacent detectors is the key. In this paper, the factors causing imaging gap are analyzed, and calculation of overlapping pixel number is given out based on the analysis. Firstly an optical-butting focal plane system is built on optical imaging principles. Then the factors causing imaging gap are listed and analyzed, under the consideration of telecentric and non-telecentric optical system. Based on the imaging gap analysis, a formula for overlapping pixel number calculation is obtained, with the MTF assurance in vignetting districts resulted from optical butting. Finally a calculation example of a camera is given.

关键词： Optical remote sensing camera Optical butting Focal Plane Overlapping pixel number imaging gap

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Research of nonlinear simulation on sweep voltage of streak tube imaging lidar 4

Research of nonlinear simulation on sweep voltage of streak ...

引用

conference on optoelectronic imaging and multimedia technology iv

作者： Zhai, Qian Han, Shao-Kun Zhai, Yu Lei, Jie-Yu Yao, Jian-Feng Beijing Inst Technol Sch Optoelect Beijing 100081 Peoples R China

ISBN: (纸本)9781510604599;9781510604605

In order to study the influence of nonlinear sweep voltage on the range accuracy of streak tube imaging lidar, a nonlinear distance model of streak tube is proposed. The model of the parallel-plate deflection system is studied, and the mathematical relation between the sweep voltage and the position of the image point on the screen is obtained based on the movement rule of phoelectron. And the mathematical model of the sweep voltage is established on the basis of its principle. The simulation of streak image is carried out for the selected staircase target, the range image of the target can be reconstructed by extremum method. Comparing reconstruction result and actual target, the range accuracy caused by the nonlinear sweep voltage is obtained. The curve of the errors varying with target ranges is also obtained. And the range accuracy of the system is analyzed by the means of changing the parameter relate to sweep time.

关键词： Streak tube imaging lidar model of sweep voltage nonlinear range model streak image simulation

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Studies on filtered back-projection imaging reconstruction based on a modified wavelet threshold function 4

Studies on filtered back-projection imaging reconstruction b...

引用

conference on optoelectronic imaging and multimedia technology iv

作者： Wang, Zhengzi Ren, Zhong Liu, Guodong Jiangxi Sci & Technol Normal Univ Personnel Dept Nanchang 330013 Jiangxi Peoples R China Jiangxi Sci & Technol Normal Univ Key Lab Opt Elect & Commun Nanchang 330038 Jiangxi Peoples R China Nanchang Univ Coll Mech & Elect Engn Nanchang 330031 Jiangxi Peoples R China

ISBN: (纸本)9781510604599;9781510604605

In this paper, the wavelet threshold denoising method was used into the filtered back-projection algorithm of imaging reconstruction. To overcome the drawbacks of the traditional soft- and hard-threshold functions, a modified wavelet threshold function was proposed. The modified wavelet threshold function has two threshold values and two variants. To verify the feasibility of the modified wavelet threshold function, the standard test experiments were performed by using the software platform of MATLAB. Experimental results show that the filtered back-projection reconstruction algorithm based on the modified wavelet threshold function has better reconstruction effect because of more flexible advantage.

关键词： image reconstruction filtered back-projection algorithm wavelet threshold denoising

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