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Design of a wide-field target detection and tracking system using the segmented planar imaging detector for electro-optical reconnaissance

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Chinese Optics Letters 2018年第7期16卷 34-39页

作者：于清华武冬梅陈福春孙胜利 Shanghai Institute of Technical Physics of the Chinese Academy of Sciences Shanghai 200083 China Key Laboratory of Infrared System Detection and Imaging Technology Shanghai 200083 China University of Chinese Academy of Sciences Beijing 100049 China

Detecting and tracking multiple targets simultaneously for space-based surveillance requires multiple cameras,which leads to a large system volume and weight. To address this problem, we propose a wide-field detection and tracking system using the segmented planar imaging detector for electro-optical reconnaissance. This study realizes two operating modes by changing the working paired lenslets and corresponding waveguide arrays： a detection mode and a tracking mode. A model system was simulated and evaluated using the peak signal-to-noise ratio method. The simulation results indicate that the detection and tracking system can realize wide-field detection and narrow-field, multi-target, high-resolution tracking without moving parts.

关键词： FOV Design of a wide-field target detection and tracking system using the segmented planar imaging detector for electro-optical reconnaissance

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Acceleration of Infrared Target detection via Efficient Channel Pruning

Acceleration of Infrared Target Detection via Efficient Chan...

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2021 International Conference on Robotics Automation and Intelligent Control, ICRAIC 2021

作者： Miao, Zhuang Zhang, Yong Li, Weihua Chen, Ruimin Key Laboratory of Infrared System Detection and Imaging Technology Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai200083 China School of Electronic Electrical and Communication Engineering University of Chinese Academy of Sciences Beijing100049 China

Deployment of modern detection models is difficult for infrared target detection used in robot vision systems due to their heavy computational burden. To alleviate this situation, a simple but efficient channel pruning method is proposed for model acceleration. Specifically, a soft-gated module combined with batch normalization (SGBN) is designed as a standalone layer to substitute the standard batch normalization (BN) layer during training. The conversion between SGBN and BN is easy, and the training overhead introduced is almost negligible after replacement. By controlling the sparsity of the scaling factor in SGBN, unimportant channels with small output are blocked automatically and globally, which is simultaneous with model training. Removing these redundant channels no longer requires fine-tuning, thus significantly speeding up the pruning process. Experiments of pruning different detection models on the infrared dataset show the effectiveness of our method. For example, the parameters and FLOPs of pruned CetnerNet are reduced by 72.70% and 40.20%, respectively, without accuracy loss. The inference speed on the CPU is 12.01ms faster. Extended studies on the classification task also demonstrate its great potential when transferring to other applications. © 2022 Institute of Physics Publishing. All rights reserved.

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Development and Prospect of Spaceborne Infrared Fourier Spectrometer 1

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5th China High-resolution Earth Observation Conference, CHREOC 2018

作者： Chen, Ren Gao, Cong Hua, Jianwen Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai200083 China Key Laboratory of Infrared Detection and Imaging Technology Chinese Academy of Sciences Shanghai200083 China University of Chinese Academy of Sciences Beijing10049 China

ISBN: (数字)9789811365539

ISBN: (纸本)9789811365522

The satellite-borne infrared Fourier spectrometer is one of the main infrared remote sensing instruments mounted on meteorological satellites. It can detect the vertical distribution of parameters such as large temperature and humidity. In this paper, the development of spaceborne infrared Fourier spectrometer is reviewed, and the performance characteristics of the spaceborne infrared Fourier spectrometer at a different stage at home and abroad are compared. Combined with the development of current instruments and the characteristics of the information age, the process of spaceborne infrared Fourier spectrometer technology development is prospected, and the development direction of "one wide and three high" and hyperspectral integrated data network is pointed out, which can provide reference for maturity and practicability of the infrared Fourier spectrometer technology in China. © 2019, Springer Nature Singapore Pte Ltd.

关键词： Fourier transform infrared spectroscopy

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The development of infrared remote sensors for Chinese meteorological satellites

The development of infrared remote sensors for Chinese meteo...

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International Conference on Infrared and Millimeter Waves

作者： Lei Ding Wei Lu Shanghai Institute of Technical Physics Key Laboratory of Infrared System Detection and Imaging Technology Shanghai China

ISBN: (纸本)9781479982738

Meteorological satellites have become an irreplaceable weather and ocean observing tool. Since the first Chinese polar-orbiting meteorological satellite Feng-Yun (FY-1A) was launched successfully in 1988, there are totally 13 meteorological satellites that were launched into both sun synchronous and geostationary orbit. China is among the few countries in the world which are simultaneously operating both orbiting meteorological satellites. All the satellites have been incorporated into the global constellations of operational meteorological satellites within the WMO framework. More satellites are under construction to be the second generation ones. The status of Chinese meteorological satellite mission is introduced in this paper.

关键词： Satellites Satellite broadcasting Infrared sensors Remote sensing Radiometry Detectors imaging

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Automatic detection and quantitative evaluation of skin hair follicles based on Mueller matrix polarimetry

Automatic detection and quantitative evaluation of skin hair...

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Polarized Light and Optical Angular Momentum for Biomedical Diagnostics 2023

作者： Hao, Rui Zhang, Zheng He, Honghui Ma, Hui Guangdong Research Center of Polarization Imaging and Measurement Engineering Technology Shenzhen Key Laboratory for Minimal Invasive Medical Technologies Institute of Biopharmaceutical and Health Engineering Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen518055 China Department of Physics Tsinghua University Beijing100084 China

ISBN: (纸本)9781510658691

Recently, Mueller matrix polarimetry has received increasing attention in the field of biophotonics, because of its great potential for non-invasive, label-free detection of microstructural and optical properties of biomedical samples. In this study, we propose a method for automatic identification and quantitative evaluation of skin hair follicle structure based on Mueller matrix polarimetry combined with the K-means clustering machine learning algorithm. First, we use the transmission Mueller matrix microscope to measure the rat skin tissue sections with hair follicles. Then we derive the Mueller matrix transformation (MMT) parameters images to reveal the characteristics of the birefringent skin hair follicle structure. By taking the MMT parameters images as the identification objects, we adopt the K-means clustering algorithm to segment them and carry out image denoising processing to achieve the automatic detection of the hair follicle structure. Finally, to identify the hair follicle structure quantitatively and accurately, we conduct a comprehensive evaluation of five indexes including quantity, area, position, long axis, and short axis of the recognized regions. The results show that the method presented in this study can realize the automatic identification and quantitative evaluation of skin hair follicle structures, having great potential for the detection and clinical diagnosis of skin structures. © 2023 SPIE.

关键词： K-means clustering

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Evaluating tissue mechanical properties using Mueller matrix polarimetry 2

Evaluating tissue mechanical properties using Mueller matrix...

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2nd Conference on Biomedical Photonics and Cross-Fusion, BPC 2023

作者： Fan, Jiahao He, Honghui Ma, Hui Guangdong Research Center of Polarization Imaging and Measurement Engineering Technology Shenzhen Key Laboratory for Minimal Invasive Medical Technologies Institute of Biopharmaceutical and Health Engineering Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen518055 China Department of Physics Tsinghua University Beijing100084 China

ISBN: (数字)9781510667556

ISBN: (纸本)9781510667549

Evaluating tissue mechanical properties is an important issue in the biomedical field. While traditional in vitro tissue deformation experiments have been used to measure mechanical properties, optical methods are becoming increasingly popular due to their non-invasive and non-contact advantages. In this study, we selected bovine tendon tissue as our experimental material. We stretched the bovine tendon tissue to varying degrees and performed Mueller matrix polarization imaging, enabling us to examine changes in both structural information and optical properties. Next, we conducted frequency distribution statistics on the Mueller matrix elements of bovine tendon tissue in different states and extracted the Mueller matrix transformation parameters to quantitatively characterize their structural differences. For better discrimination of tendon tissues under different stretching states, we trained an image classification neural network using the derived MMT parameters as input. Ultimately, we obtained a highly accurate model with 90% precision. © 2023 SPIE.

关键词： Polarimeters

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Analyzing the influence of imaging resolution on tissue polarimetry basis parameters 12

Analyzing the influence of imaging resolution on tissue pola...

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Optics in Health Care and Biomedical Optics XII 2022

作者： Shao, Conghui He, Honghui Ma, Hui Guangdong Research Center of Polarization Imaging and Measurement Engineering Technology Shenzhen Key Laboratory for Minimal Invasive Medical Technologies Institute of Biopharmaceutical and Health Engineering Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen518055 China Department of Physics Tsinghua University Beijing100084 China

ISBN: (纸本)9781510657069

Mueller matrix imaging contains abundant microstructural information of the sample and provides quantitative characterization of anisotropic structures. In contrast to non-polarized microscopic imaging, Mueller matrix imaging can obtain basic structural information of the sample, such as fiber orientation and density, from polarization parameter images at low resolution. To analyze the combined effect of imaging resolution on Mueller matrix polarization properties, we first measured Mueller matrix images of unstained collagen fiber-rich rat dorsal skin sections using a range of objective magnification or numerical aperture (NA) values. Quantitative analysis of first-order moments and image texture parameters were then compared in conjunction with polarimetry basis parameters images. The results show that the polarimetry basis parameter images preserve most of the structural information of the sample and can provide fast imaging speed. This study provides a criterion to determine which structural information can be accurately and rapidly obtained by transmission Mueller matrix microscopy with low NA targets to aid in pathological diagnosis and other applications. © 2022 SPIE.

关键词： polarization

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An improvement method of a lossless compression scheme for the datacube from Geostationary Interferometric Infrared Sounder (GIIRS) and its FPGA implementation 9

An improvement method of a lossless compression scheme for t...

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9th IEEE Joint International Information technology and Artificial Intelligence Conference, ITAIC 2020

作者： Yang, Minzhu Hernandez, Raul Guerra Han, Changpei Feliciano, Jose Francisco Lopez China Jiliang University Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province College of Information Engineering Hangzhou China Instituto Universitario de Microelectrónica Aplicada Universidad de Las Palmas de Gran Ganaria Las Palmas Spain Chinese Academy of Science Key Laboratory of Infrared System Detection and Imaging Technology Shanghai China

This paper briefly described an improved method for the original proposed scheme based on Vector Quantization and Linear Prediction to further enhance the compression ratio while reduce the time cost. Given the fact that the interferograms belong to the same datacube are similar to each other, there are two obvious modifications in this paper: predict only once to get the general predicted coefficients for the same datacube;along with treat datacube rather than sequence as the encoded unit. The time consumption spent by Linear Prediction part will shrink about 35.55% by predicting just once. Moreover, the change of the encoded object makes the final compression ratio get a further rise range from 2.62% to 3.711%. © 2020 IEEE.

关键词： Field programmable gate arrays (FPGA)

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Comparative study of the influence of imaging resolution on polarization properties derived from Mueller matrix

Comparative study of the influence of imaging resolution on ...

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Polarized Light and Optical Angular Momentum for Biomedical Diagnostics 2023

作者： Zhang, Yuxin Shao, Conghui He, Honghui Ma, Hui Guangdong Research Center of Polarization Imaging and Measurement Engineering Technology Shenzhen Key Laboratory for Minimal Invasive Medical Technologies Institute of Biopharmaceutical and Health Engineering Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen518055 China Department of Physics Tsinghua University Beijing100084 China

ISBN: (纸本)9781510658691

For pathological diagnosis using optical microscopes, imaging speed and resolution are two important considerations. Usually, the improvement of imaging resolution will reduce the field of view and greatly extend the imaging time. Recently, studies have shown that some polarization information obtained from Mueller matrix connecting with structural features can be preserved under relatively low imaging resolution. Here, to systematically investigate the influence of imaging resolution on polarization properties derived from Mueller matrix, we first perform transmission Mueller matrix microscopic imaging on the unstained rat dorsal skin tissue samples, which have rich fibrous structures. Then, we carry out quantitative analysis using the statistics and the image texture feature parameters to compare the Mueller matrix polarimetric parameters images at different resolutions. The results show that, compared with the traditional non-polarized microscopic images, the Mueller matrix polarimetric parameters, which can characterize the fiber density information of the sample, are less sensitive to the imaging resolution, while other polarimetric parameters derived from the Mueller matrix related to the particle sizes still need high resolution to provide accurate structural information. This study demonstrates that it is possible to consider both imaging resolution and speed when using Mueller matrix polarimetry for tissue detection, and proposes relevant criteria to meet the above requirements, which is of great significance for application scenarios that need accurate and high-speed optical measurement. © 2023 SPIE.

关键词： Polarimeters

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CO_2 Monitoring Spectrometer with 640×512 Pixel SWIR InGaAs Focal Plane Array

CO_2 Monitoring Spectrometer with 640×512 Pixel SWIR InGaAs...

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Symposium on Photonics and Optoelectronics

作者： Wei Peng Shixiang Wu Lei Ding Xianghua Wang Yihe Hou Jiaqing Liu Chan Tan Yuxuan Liu Key laboratory of Infrared System Detection and Imaging Technology Shanghai Institute of Technical Physics Chinese Academy of Sciences

ISBN: (纸本)9781457709098

This paper introduces a prototype grating spectrometer measuring atmospheric column carbon dioxide (CO_2) with a 640×512 pixel indium gallium arsenide (InGaAs) focal plane array (FPA). The spectrometer achieves the spectral resolutions of 0.1 nm at 1.61μm CO_2 band meets the measurement requirement. The structure of the spectrometer including optics and electronics has been described in this paper. The spectrometer features a relatively fast optics, f/1.8, which benefits the sensitivity, and combines a fine slit with a large planar reflective diffraction grating. The performance of the optical design is presented to demonstrate the optical system meets the requirements for spectral resolution and sensitivity. The 640×512 InGaAs FPA with a low noise acquisition system serves to provide low noise spectral signals. The 640×512 InGaAs FPA, 25 μm pixel size, is sensitive to 0.9μm-to-1.7μm short wave infrared (SWIR) band and features a 298 K temperature detectivity, D~*, greater than 5×10~(12) cm~(-1)√Hz/W.

关键词： CO_2 InGaAs FPA Short-wave infrared High spectral resolution Grating spectrometer Low noise

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