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detection Method of Ship Target infrared Polarization Image

Journal of Physics: Conference Series 2021年第2期1802卷

作者： Haonan Tuo Guochuan Shi Xiaolin Luo Army Artillery and Air Defense Academy Heifei China Anhui province Key Laboratory of Polarization Imaging Detection Technology Hefei China

In the face of complex background and severe weather environment, infrared polarization detection has obvious advantages. In this paper, the ship target detection method based on infrared polarization image is studied and the ship target infrared polarization image detection method based on local contrast is proposed. The ship target detection accuracy of the proposed algorithm is 0.956, and the false alarm rate of the ship detection is low, which verifies the effectiveness of the detection algorithm in detecting the ship target, which has great application value in military applications.

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Acceleration of infrared Target detection via Efficient Channel Pruning

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Journal of Physics: Conference Series 2022年第1期2203卷

作者： Zhuang Miao Yong Zhang Weihua Li Ruimin Chen Key Laboratory of Infrared System Detection and Imaging Technology Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083 China School of Electronic Electrical and Communication Engineering University of Chinese Academy of Sciences Beijing 100049 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.

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infrared Polarization Image Fusion and detection System for Ship Target

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Journal of Physics: Conference Series 2021年第2期1802卷

作者： Haonan Tuo Guochuan Shi Xiaolin Luo Army Artillery and Air Defense Academy Heifei China Anhui province Key Laboratory of Polarization Imaging Detection Technology Hefei China

In order to realize the fusion and detection of ship targets, infrared polarization image fusion and detection technology is adopted in this paper, and a design scheme of infrared polarization image fusion and detection system based on ship targets is proposed, which solves the key technologies such as processing system and fusion and detection algorithm, and the image detection rate is high. The proposed system can be used as a laboratory standby system.

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Scatter correction for photon-counting detector based CBCT imaging

arXiv

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arXiv 2024年

作者： Zhang, Xin Su, Ting Zhu, Jiongtao Zheng, Hairong Liang, Dong Ge, Yongshuai Research Center for Advanced Detection Materials and Medical Imaging Devices Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Guangdong Shenzhen518055 China University of Chinese Academy of Sciences Beijing100049 China Paul C Lauterbur Research Center for Biomedical Imaging Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Guangdong Shenzhen518055 China Key Laboratory of Biomedical Imaging Science and System Research Center for Medical Artificial Intelligence Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Guangdong Shenzhen518055 China National Innovation Center for Advanced Medical Devices Guangdong Shenzhen518131 China

Objective: The aim of this study is to validate the effectiveness of an energy-modulated scatter correction method in suppressing scatter in photon-counting detector (PCD)-based cone beam CT (CBCT) imaging. Approach: The scatter correction method, named e-Grid, which was initially applied to dual-layer flat-panel detector (DLFPD)-based CBCT imaging, was tested for its performance in PCD-CBCT imaging. Benchtop PCD-CBCT imaging experiments were conducted to verify the effectiveness of the e-Grid method. Additionally, quantitative metrics were measured from these experimental results. Main results: It was found that the use of the e-Grid method could significantly eliminate cupping artifacts caused by Compton scatter in PCD-CBCT imaging. Meanwhile, its effectiveness was observed in both low- and high-energy images, as well as for objects of varying sizes. Quantitative results showed that the e-Grid method could reduce scatter artifacts by at least 71% in low-energy images and 75% in high-energy images. Significance: It was demonstrated that the scatter correction method originally applied to DLFPD-based CBCT could also perform well in PCD-CBCT, showing that the e-Grid method has great potential for application in other spectral CBCT imaging systems. Copyright © 2024, The Authors. All rights reserved.

关键词： Photons

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High Affinity to Skeleton Rare Earth Doped Nanoparticles for Near-infrared Ⅱ imaging

High Affinity to Skeleton Rare Earth Doped Nanoparticles for...

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第十一届全国化学生物学学术会议

作者：和树庆 Changfeng Wu Junle Qu Zhen Cheng 南方科技大学 Academy for Advanced Interdisciplinary Studies and Department of Biomedical Engineering Southern University of Science and Technology(SUSTech) Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic EngineeringShenzhen University Molecular Imaging Program at Stanford(MIPS) Bio-X Programand Department of RadiologyCanary Center at Stanford for Cancer Early DetectionStanford University

As a newly non-invasive emerging modality,NIR-Ⅱ fluorescence imaging(1000-1700 nm) has many advantages over conventional visible and NIR-I imaging(700-900 nm).[1-5] Unfortunately,few NIR-Ⅱ fluorophores are suitable for bone ***,we report an NIR-Ⅱ fluorophore based on DSPE-mPEG encapsulated rare earth doped nanoparticles(RENPs@DSPE-mPEG),which shows inherent affinity to bone without linking any targeting ligands,and thus it provides an alternative non-invasive and non-radiation strategy for skeletal system mapping and bone diseases ***,within NIR-Ⅱ window,imaging at longer wavelength(1345 nm) provides higher resolution and signal-to-noise ratio than that imaging at 1064 nm,even though quantum yield at 1064 nm is 2-fold higher than that at 1345 nm.[2] Besides bone imaging,RENPs@DSPE-mPEG show imaging application in blood vessel and lymph ***,RENPs@DSPE-mPEG can be internalized by circulating white blood *** finding may open a window to increase efficient nanoparticle delivery in the fields such as immunotherapy and improve the diagnostic and therapeutic efficacy of cancer-targeted nanoparticles in clinical applications.

关键词： NIR-Ⅱ imaging NIR-Ⅱa imaging Bone imaging Rare earth doped nanoparticles Thrombus

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Research on Spatial Spectrum Constraint of Distributed Passive Radar imaging

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IOP Conference Series: Materials Science and Engineering 2020年第5期782卷

作者： Yanhou Zhang Shuo Wang Hao Zhai Yusheng Han Anhui Province Key laboratory of Polarized Imaging Detection Technology Department of Information Engineering Army Academy of Artillery and Air Defence Forces Hefei 230031 China

Spatial spectrum is an important tool for radar imaging performance analysis. In order to analyze the effect of spatial spectrum filling on the imaging quality of distributed passive radar, the constraints of spatial spectrum filling are studied. The imaging model of distributed passive radar is established, the imaging resolution characteristics are analyzed, and the influencing factors of spatial spectrum filling are obtained. The filling rule of spatial spectrum is analyzed, and the constraint conditions for the critical azimuth and arc of filling are given. The validity of the constraint conditions is verified by simulation, which has guiding significance for optimization of radar station layout and imaging quality improvement.

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Minute-cadence observations on Galactic plane with Wide Field Survey Telescope (WFST): Overview, methodology and early results

arXiv

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arXiv 2024年

作者： Lin, Jie Wang, Tinggui Cai, Minxuan Wan, Zhen Li, Xuzhi Fan, Lulu Zhu, Qingfeng Jiang, Ji-An Jiang, Ning Kong, Xu Lin, Zheyu Zhu, Jiazheng Liu, Zhengyan Gao, Jie Li, Bin Li, Feng Liang, Ming Liu, Hao Liu, Wei Luo, Wentao Tang, Jinlong Wang, Hairen Wang, Jian Xue, Yongquan Yao, Dazhi Zhang, Hongfei Zhang, Xiaoling Zhao, Wen Zheng, Xianzhong Department of Astronomy University of Science and Technology of China Hefei230026 China School of Astronomy and Space Science University of Science and Technology of China Hefei230026 China Deep Space Exploration Laboratory Hefei230088 China Institute of Astronomy and Astrophysics Anqing Normal University Anhui Anqing246133 China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Hefei230026 China Purple Mountain Observatory Chinese Academy of Sciences Nanjing210023 China National Optical Astronomy Observatory NSF’s National Optical-Infrared Astronomy Research Laboratory 950 N Cherry Ave. TucsonAZ85726 United States Institute of Optics and Electronics Chinese Academy of Sciences Chengdu610209 China

As the time-domain survey telescope of the highest survey power in the northern hemisphere currently, Wide Field Survey Telescope (WFST) is scheduled to hourly/daily/semi-weekly scan northern sky up to ∼ 23 mag in four optical (ugri) bands. Unlike the observation cadences in the forthcoming regular survey missions, WFST performed "staring" observations toward Galactic plane in a cadence of ≈ 1 minute for a total on-source time of about 13 hours, during the commissioning and pilot observation phases. Such an observation cadence is well applied in producing densely sampling light curves and hunting for stars exhibiting fast stellar variabilities. Here we introduce the primary methodologies in detecting variability, periodicity, and stellar flares among a half million sources from the minute-cadence observations, and present the WFST g-/r-band light curves generated from periodic variable stars and flaring stars. Benefit from high photometric precisions and deep detection limits of WFST, the observations have captured several rare variable stars, such as a variable hot white dwarf (WD) and an ellipsoidal WD binary candidate. By surveying the almost unexplored parameter spaces for variables, WFST will lead to new opportunities in discovering unique variable stars in the northern sky. Copyright © 2024, The Authors. All rights reserved.

关键词： White dwarfs

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Corrections to “Surface Leakage Behaviors of 2.6 μm In0.83Ga0.17As Photodetectors as a Function of Mesa Etching Depth” [Apr 20 doi: 10.1109/JQE.2020.2970745]

引用

IEEE Journal of Quantum Electronics 2023年第6期59卷

作者： Yage Liu Yingjie Ma Xue Li Yi Gu Yonggang Zhang Haimei Gong Jiaxiong Fang State Key Laboratories of Transducer Technology and Key Laboratory of Infrared Imaging Materials and Detectors Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai China University of Chinese Academy of Sciences Beijing China

In the above article [1] , the affiliations were written as: The authors are with the State key Laboratories of Transducer technology, key laboratory of infrared imaging Materials and Detectors, Shanghai Institute of... 详细信息

关键词： Dark current Etching Temperature distribution Temperature measurement Photodetectors Gallium arsenide Indium gallium arsenide Leakage currents

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Corrections to “2.45-μm 1280 × 1024 InGaAs Focal Plane Array With 15-μm Pitch for Extended SWIR imaging” [Feb 15 2022 231-234]

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IEEE Photonics technology Letters 2022年第6期34卷 305-305页

作者： J. F. Cheng X. Li X. M. Shao T. Li Y. J. Ma Y. Gu S. Y. Deng Y. G. Zhang H. M. Gong State Key Laboratories of Transducer Technology and Key Laboratory of Infrared Imaging Materials and Detectors Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai China University of Chinese Academy of Sciences Beijing China

In the above article [1] , the affiliations were written as:

关键词： imaging Indium gallium arsenide Dark current

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A compact signal transmitter for UV communication system

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Journal of Physics: Conference Series 2011年第1期276卷

作者： Rongyang Wang Yonggang Yuan Chao Li Yan Zhang Xiangyang Li State Key Laboratories of Transducer Technology Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083 China Key Laboratory of Infrared Imaging Materials and Detectors Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083 China

Three LED-based signal transmitting schemes were presented to build the transmitter of UV communication system. Microprogrammed Control Unit (MCU) was taken to generate digital driving signal and to accomplish modulation with Keil C51 development tool. The modulated signal with a certain pulse width was sent to a LED driving circuit. High power 365nm UV LED was adopted according to the trade-off between its scattering coefficient and price. Utilization of high power UV LED improved the integration density of printed circuit board (PCB), which was beneficial to assemble a beam shaping system. The whole transmitter was installed on a four-dimensional optical stage for system adjustments and measurements. The radiant optical power of UV LED was measured. Some issues about the PCB design were also discussed. The MCU output waveforms were demonstrated on an oscilloscope and the UV LED output optical pulse were verified by a Hamamatsu APD module. Different modulation data rates were investigated. Experimental result showed that this signal transmitter for UV communication system could transmit optical signal well and greatly shorten the system development cycle.

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