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6th Conference on Frontiers in Optical imaging and technology: imaging detection and Target Recognition

作者： Fan, Yang Qiheng, Huang Beiyao, Cui Army Academy of Artillery and Air Defense of PLA Hefei Anhui230031 China Anhui Provincial Key Laboratory of Polarization Imaging Detection Technology Hefei230031 China

ISBN: (数字)9781510679733

ISBN: (纸本)9781510679726

In order to reduce the impact of cloud clutter on target detection in infrared polarization images under sky background, a target detection method based on maximally stable external regions (MSER) is proposed. Firstly, subtract each pixel of the infrared polarization image from the mean of the vertical and horizontal directions of the image. The non positive pixel is the cloud background, and the grayscale value is set to 0 to obtain the cloud clutter background suppression polarization image. Then, using geometric feature constraints, the final aircraft target detection result is obtained by setting a reasonable aspect ratio threshold and the contrast threshold between the target and the background, removing non target areas such as cloud edge clutter and ripples. Two indicators, accuracy and recall, were used to evaluate the detection performance. The experimental results showed that the clutter suppression and target detection methods studied in this paper can effectively suppress the adverse effects of cloud clutter on detecting aircraft targets in infrared polarized images under different thickness cloud sky scenes, and the detection effect is significantly improved. © 2024 SPIE. All rights reserved.

关键词： Aspect ratio

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Construction of Sea surface electromagnetic scattering model and Doppler analysis 8

Construction of Sea surface electromagnetic scattering model...

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8th Symposium on Novel Photoelectronic detection technology and Applications

作者： Zhang, Liang Yang, Fan Zu, Hongyu Province Key Laboratory of Polarization Imaging Detection Technology Anhui Province Anhui Hefei230031 China

ISBN: (数字)9781510653122

ISBN: (纸本)9781510653115

Firstly, the geometric model of linear sea surface is constructed based on linear wave theory and linear filtering method. At the same time, considering the nonlinear characteristics of sea waves, the modified model of nonlinear sea surface is introduced. By comparing the shape and statistical characteristics of nonlinear sea surface with linear sea surface, the Doppler echo spectrum of sea surface electromagnetic scattering is calculated, and the Doppler spectrum characteristics of dynamic sea surface scattering echo signals under different initial conditions are analyzed. Finally, the model simulation data are compared with the measured sea state data. The results show that the calculation results based on nonlinear sea surface are more consistent with the experimental data. © 2022 SPIE

关键词： Doppler effect

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A blind element detection and correction method for pixel coupled infrared polarization imaging system 9

A blind element detection and correction method for pixel co...

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9th Symposium on Novel Photoelectronic detection technology and Applications

作者： Fan, Yang Juan, Zhao Army Academy of Artillery and Air Defense of PLA Anhui Hefei230031 China Anhui Provincial Key Laboratory of Polarization Imaging Detection Technology Hefei230031 China

ISBN: (纸本)9781510664432

In order to improve the accuracy of pixel coupled infrared polarization imaging system, based on the analysis of the characteristics of blind elements, a blind element detection and correction method based on the nearest neighbor parameter is proposed. Blind elements are detected by two-way derivative operation in Stokes vector, the concepts of nearest neighbor and reference polarization pixel are introduced, and the identification methods of fixed blind elements, random blind elements and point targets are classified, According to the polarization parameter distribution in the neighborhood of the blind element, the blind element correction is realized. The experimental results show that this method can effectively improve the acquisition ability of polarization information of incident light, reduce the system error, and improve the detection accuracy of the pixel coupled polarization imaging system. © 2023 SPIE.

关键词： Pixels

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Research on the novel concentration sensor based on multi-longitudinal mode laser interference 9

Research on the novel concentration sensor based on multi-lo...

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9th Symposium on Novel Photoelectronic detection technology and Applications

作者： Wang, Chenchen Xu, Yao Zu, Hongyu Gu, Kang Huang, Qiheng Huang, Qinchao Wang, Yong Anhui Provincial Key Laboratory of Polarization Imaging Detection Technology He Fei230031 China Army Academy of Artillery and Air Defense PLA Anhui Hefei230031 China

ISBN: (纸本)9781510664432

In this paper, a novel non-contact optical measurement method based on the principle of laser self mixing interference for measuring liquid concentration is proposed. The optical path difference caused by changing the concentration of the solution, we found the phenomenon of waveform separation in the laser self-mixing vibration signal. In this system, simulation results of different solution concentrations are obtained based on the feature that each longitudinal mode is independent and do not interfere with each other in the multi-longitudinal mode laser, which successfully verified the corresponding relationship between the degree of waveform separation and the concentration of the solution. © 2023 SPIE.

关键词： Optical data processing

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Model and Analysis of the top of Atmosphere’s polarization Radiation Characteristics based on Ocean Scene 3

Model and Analysis of the top of Atmosphere’s Polarization ...

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3rd International Computing imaging Conference, CITA 2023

作者： Wu, Lingxia Zeng, Xianfang Wu, Yunzhi Huang, Qinchao Huang, Qiheng Army Academy of Artillery and Air Defense of PLA Hefei Anhui230031 China Anhui Provincial Key Laboratory of Polarization Imaging Detection Technology Hefei Anhui230031 China Anhui Water Conservancy Technical College China

ISBN: (纸本)9781510671409

In view of the problem of attenuation or polarization state change caused by atmospheric radiation transmission in the long-distance path transmission of target polarization information, the atmospheric polarization characteristics based on atmospheric vector radiative transmission are studied, and the polarization characteristic modeling is completed. First using rough sea surface Cox-Munk model and Fresnel reflection law to simulate the real sea surface radiation state, determine the environmental data needed for the simulation, then based on radiation transmission simulation tools analysis of atmospheric Rayleigh scattering and aerosol scattering influence on the polarization radiation state, finally with the sea surface radiation state coupling get atmospheric top polarization radiation state. In order to verify the correctness of the proposed modeling method, the modeling results of this method are compared with the data actually obtained by the polarization detector of DPC. The results show that the overall trend and consistency of the observed and simulated values are good. This method can effectively simulate the polarization characteristics of the sea atmosphere in sunny and cloudy weather, and provide good data support for the offshore polarization detection in sunny and cloudy weather conditions. © 2023 SPIE.

关键词： Surface waters

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Enhanced Two Dimensional Turntable Radar imaging Using Minimal Sparse Nonconvex Optimization 8

Enhanced Two Dimensional Turntable Radar Imaging Using Minim...

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8th Symposium on Novel Photoelectronic detection technology and Applications

作者： Wang, Shuo Lu, Xinfei Wu, Lingxia Key Laboratory of Polarization Imaging Detection Technology Anhui Province Hefei230031 China The Chinese Academy of Sciences Key Laboratory of Electromagnetic Space Information University of Science and Technology of China Hefei230027 China

ISBN: (数字)9781510653122

ISBN: (纸本)9781510653115

Compressed sensing (CS) techniques have shown promise for radar imaging applications due to the excellent images they can produce. In this paper, a two dimensional (2D) sparse signal model for turntable radar imaging is developed, and a 2D CS based image reconstruction algorithm with a hyperbolic tangent constraint is proposed to improve the imaging performance and avoid the huge computational burden of 1D CS based methods, which require a tremendous amount of memory and computational resources. The augmented Lagrange multiplier and a 2D iterative soft thresholding function are used for solving the minimally sparse nonconvex optimization problem with parameter adjustment. Moreover, its convergence can be proved. Experimental results are presented to demonstrate the validity of the proposed approach. © 2022 SPIE

关键词： Radar imaging

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Research on polarization imaging detection and Tracking Method of low-speed and small UAV Targets 8

Research on Polarization Imaging Detection and Tracking Meth...

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8th Symposium on Novel Photoelectronic detection technology and Applications

作者： Huang, Qinchao Ren, Shuaijun Zhu, Hong Wu, Lingxia Yang, Fan Anhui Key Laboratory of Polarized Light Imaging Detection Technology Hefei230031 China

ISBN: (数字)9781510653122

ISBN: (纸本)9781510653115

Aiming at the problem of the low contrast between target and background in the detected UAV target intensity images, a low-speed and small UAV targets detection and tracking method based on polarization imaging detection is proposed. Based on the analysis of the polarization imaging characteristics of low-speed and small UAV targets, through polarization image analysis, single-frame detection based on spatial filtering and adaptive threshold segmentation, continuous frame target trajectory association based on spatiotemporal information, and improved KCF algorithm Target tracking and other processing processes have realized the effective detection and tracking of low-speed and small UAV targets. © 2022 SPIE

关键词： Unmanned aerial vehicles (UAV)

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Research on a fast infrared dim small targets detection and tracking method combining Pipeline Filter and Kernelized Correlation Filter 8

Research on a fast infrared dim small targets detection and ...

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8th Symposium on Novel Photoelectronic detection technology and Applications

作者： Ren, Shuaijun Huang, Qinchao Yuan, Guanglin Han, Yusheng Yang, Fan Anhui Key Laboratory of Polarized Light Imaging Detection Technology Hefei230031 China

ISBN: (数字)9781510653122

ISBN: (纸本)9781510653115

To solve the problem that infrared dim small targets are difficult to be detected and tracked under complex background,this paper proposes a method based on the fusion of Pipeline Filter and Kernelized Correlation ***, preprocess the obtained image sequence to reduce the influence of complex background on target detection;then, detect dim small infrared moving targets based on Background Prediction and Pipeline Filter;Finally,track the targets by Kernelized Correlation Filter which is initialized by the obtained detection *** deal with the interference caused by the lens moving, the target position is predicted in the process of targets *** algorithm is verified by the constructed infrared dim target data set. The results show that the proposed algorithm has better robustness and real-time performance, and the tracking effect is obvious. © 2022 SPIE

关键词： Target tracking

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Research on Improved Faster R-CNN polarization Image detection Method 8

Research on Improved Faster R-CNN Polarization Image Detecti...

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8th Symposium on Novel Photoelectronic detection technology and Applications

作者： Wang, Rongchang Wang, Shuo The Key Laboratory of Polarized Light Imaging Detection Technology of Anhui Province Chinese Academy of Sciences Anhui Hefei230031 China

ISBN: (数字)9781510653122

ISBN: (纸本)9781510653115

polarization imaging technology is an optical reconnaissance method based on the polarization characteristics of the target, which can simultaneously obtain a variety of information about the target. This information is very useful for visual tasks such as target detection. The traditional polarization parameter map as the input source for target detection has the problems of low accuracy and weak generalization ability. To solve the above problems, this paper builds a polarization parameter feature extraction network on the basis of Faster R-CNN, and adaptively generates polarization parameters. Perform feature extraction. It has been verified that the detection accuracy has been improved compared to the traditional network with polarization parameters as the input source. © 2022 SPIE

关键词： Computer vision

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Molecular exchange and passivation at interface afford high-performing perovskite solar cells with efficiency over 24%

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Journal of Energy Chemistry 2023年第7期82卷 219-227,I0005页

作者： Jianjun Sun Wangchao Chen Yingke Ren Yunjuan Niu Zhiqian Yang Li'e Mo Yang Huang Zhaoqian Li Hong Zhang Linhua Hu Key Laboratory of Photovoltaic and Energy Conservation Materials Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031AnhuiChina School of Chemistry and Chemical Engineering Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of TechnologyHefei 230009AnhuiChina College of Science Hebei University of Science and TechnologyShijiazhuang 050018HebeiChina Hebei Computational Optical Imaging and Photoelectric Detection Technology Innovation Center Hebei International Joint Research Center for Computational Optical Imaging and Intelligent SensingSchool of Mathematics and Physics Science and EngineeringHebei University of EngineeringHandan 056038HebeiChina University of Science and Technology of Chin1 Anhui 230026HefeiChina

The interface is crucial for perovskite solar cells(PSCs).However,voids at interfaces induced by the trapped hygroscopic dimethyl sulfoxide(DMSO)can reduce charge extraction and accelerate the film degradation,seriously damaging the efficiency and *** this work,4,4’-dinonyl-2,2’-dipyridine(DN-DP),a Lewis base with long alkyl chains is introduced to solve this *** calculated and experimental results confirm that the dipyridyl group on DN-DP can more strongly coordinate with Pb^(2+)than that of the S=O group on *** strong coordination effect plays a crucial role in removing the DMSO-based adduct and reducing the formation of *** to the electron-donating properties of pyridine,the existence of DN-DP in the perovskite film can passivate the defects and optimize the energy level alignment of the perovskite *** open-circuit voltage(VOC)of the DN-DP-based PSC is improved from 1.107 V(control device)to 1.153 V,giving rise to a power conversion efficiency(PCE)of24.02%.Furthermore,benefiting from the moisture resistance stemming from the hydrophobic nonyl group,the PCE retains 90.4%of the initial performance after 1000 h of storage in the ambient condition.

关键词： Perovskite solar cell Anti-solvent 4 4′-Dinonyl-2 2′-dipyridine Optimized interfaceStability

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