检索结果-内蒙古大学图书馆

infrared small target detection based on spatial attention density peaks searching

Optoelectronics Letters 2025年第2期21卷 90-96页

作者： RAO Junmin LU Siyu LIU Shijian LI Fanming CAS Key Laboratory of Infrared System Detection and Imaging Technology Shanghai Institute of Technical PhysicsShanghai 200083China University of Chinese Academy of Sciences Beijing 100049China Shanghai Institute of Technical Physics Chinese Academy of SciencesShanghai 200083China School of Information Science and Technology ShanghaiTech UniversityShanghai 201210China

The detection of small targets poses a significant challenge for infrared search and tracking (IRST) systems,as they must strike a delicate balance between accuracy and *** this paper,we propose a detection algorithm based on spatial attention density peaks searching (SADPS) and an adaptive window selection ***,the difference-of-Gaussians (DoG) filter is introduced for preprocessing raw infrared ***,the image is processed by ***,an adaptive window selection scheme is applied to obtain window templates for the target scale ***,the small target feature is used to enhance the target and suppress the ***,the true targets are segmented through a *** experimental results show that compared with the seven state-of-the-art small targets detection baseline algorithms,the proposed method not only has better detection accuracy,but also has reasonable time consumption.

关键词： template searching infrared

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infrared aircraft few-shot classification method based on cross-correlation network

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红外与毫米波学报 2025年第1期44卷 103-111页

作者： HUANG Zhen ZHANG Yong GONG Jin-Fu Key Laboratory of Infrared System Detection and Imaging Technology Chinese Academy of SciencesShanghai 200083China University of Chinese Academy of Sciences Beijing 100049China Shanghai Institute of Technical Physics Chinese Academy of SciencesShanghai 200083China

In response to the scarcity of infrared aircraft samples and the tendency of traditional deep learning to overfit,a few-shot infrared aircraft classification method based on cross-correlation networks is *** method combines two core modules:a simple parameter-free self-attention and *** analyzing the self-correlation and cross-correlation between support images and query images,it achieves effective classification of infrared aircraft under few-shot *** proposed cross-correlation network integrates these two modules and is trained in an end-to-end *** simple parameter-free self-attention is responsible for extracting the internal structure of the image while the cross-attention can calculate the cross-correlation between images further extracting and fusing the features between *** with existing few-shot infrared target classification models,this model focuses on the geometric structure and thermal texture information of infrared images by modeling the semantic relevance between the features of the support set and query set,thus better attending to the target *** results show that this method outperforms existing infrared aircraft classification methods in various classification tasks,with the highest classification accuracy improvement exceeding 3%.In addition,ablation experiments and comparative experiments also prove the effectiveness of the method.

关键词： infrared imaging aircraft classification few-shot learning parameter-free attention cross attention

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A design of on-board dual-channel data handling method based on two FPGAs 6

A design of on-board dual-channel data handling method based...

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6th International SpaceWire Conference, SpaceWire 2014

作者： Yaopu, Zou Jiayou, Jiang Changpei, Han Key Laboratory of Infrared System Detection and Imaging Technology Shanghai Institute of Technical Physics UCAS Shanghai China Key Laboratory of Infrared System Detection and Imaging Technology Shanghai Institute of Technical Physics CAS Shanghai China

ISBN: (纸本)9780955719653

SpaceWire is used on FY4 meteorological satellite as on-board data-handling network. Based on SpaceWire, this paper provides a design using two FPGAs and AT7911 chips for the dual-channel data processing of a payload on FY4 to ensure that data can be transported efficiently and reliably. This design has proved to be feasible when tested on the ground. © 2014 University of Dundee.

关键词： Data handling

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Structural Damage detection and Localization Using Response Difference Transmissibility

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Journal of Shanghai Jiaotong university(Science) 2024年第6期29卷 1126-1138页

作者： WANG Zengwei DING Lei Shanghai Institute of Technical Physics Key Laboratory of Infrared System Detection and Imaging TechnologyChinese Academy of SciencesShanghai 200083China

In this paper,a novel method is proposed for structural damage detection and *** key of the proposed method is the use of the response difference transmissibility(RDT)for damage *** RDT is defined to relate response differences of the system to be evaluated and those of the original *** invariance properties of RDT are also *** on this,a damage indicator is proposed,and the benefits are verified by a numerical ***,the proposed method is illustrated and validated by finite element simulations and experimental case studies.

关键词： damage detection damage localization transmissibility mechanical vibrations

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A novel method of spike detection for interferograms based on two-step filtering

A novel method of spike detection for interferograms based o...

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4th International Conference on Frontiers of Manufacturing Science and Measuring technology, ICFMM 2014

作者： Zou, Yao Pu Han, Chang Pei Zhang, Lei Pan, Wen Gui Wang, Chao Key Laboratory of Infrared System Detection and Imaging Technology SITP UCAS China

ISBN: (纸本)9783038351924

According to the characteristics of interferogram, we design a new spike detection method, which firstly filters an interferogram with two different ways and then detects spikes based on both results. Theoretical analysis and computer simulation shows that this algorithm performs well in detecting spikes in any position of an interferogram with high accuracy, and can be easily implemented in hardware. © (2014) Trans Tech Publications, Switzerland.

关键词： Computer hardware

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A method to compensate the dead time for three-phase PWM inverters

A method to compensate the dead time for three-phase PWM inv...

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International Conference on Frontiers of Energy, Materials and Information Engineering, ICFMEI 2014

作者： Pan, Wen Gui Zhang, Lei Zou, Yao Pu Wang, Chao Han, Chang Pei Key Laboratory of Infrared System Detection and Imaging Technology SITP UCAS Shanghai China

ISBN: (纸本)9783038352778

As for a vector control of a permanent magnet synchronous motor, this paper analyzed the influence of dead-time effect of three-phase bridge inverters on output voltage and current in details. A novel on-line method was proposed for dead-time effect compensation based on disturbance observer. At last, the method is simulated using MATLAB and the simulation results proves the effectiveness and feasibility of the method presented. © (2014) Trans Tech Publications, Switzerland.

关键词： Pulse width modulation

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High-accuracy source-independent radiometric calibration with low complexity for infrared photonic sensors

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Light(Science & Applications) 2021年第9期10卷 1714-1725页

作者： Qiang Guo Fuchun Chen Xiangyang Li Boyang Chen Xin Wang Guilin Chen Caiying Wei National Satellite Meteorological Center China Meteorological Administration100081BeijingChina Key Laboratory of Infrared System Detection&Imaging Technology Shanghai Institute of Technical PhysicsChinese Academy of Sciences200083ShanghaiChina Key Laboratory of Infrared Imaging Materials&Detectors Shanghai Institute of Technical PhysicsChinese Academy of Sciences200083ShanghaiChina

Radiometric calibration(RC)is an essential solution to guarantee measurements from infrared photonic sensors with certain accuracy,the main task of which is to determine the radiometric responsivity of sensor and usually be solved by comparing with some radiation source(i.e.,blackbody),called source-based RC(SBRC).In addition to the complexity in manufacture,the nonideal characteristics of an available source will inevitably introduce unexpected uncertainties to reduce the final calibration accuracy by around 0.2–0.5 K in ***,we propose an original source-independent RC(SIRC)principle based on modeling instead of comparing for SBRC,where the incident background radiation to detector,as a dominated factor influencing the responsivity characteristics of a photonic sensor,is modeled to implement RC for both two fundamental types(photoconductive and photovoltaic)of HgCdTe photonic *** SIRC merely requires the temperature information of main components of a sensor other than some complex source and its assembly,and provides a traceable way at lower uncertainty costs relative to the traditional *** SIRC is being implemented in Fengyun-2 satellites since 2019,which ensures a long-term stable service of Chinese geostationary meteorological satellites for the global observation system under the framework of World Meteorological ***,a 20-year-period traceable Fengyun-2 dataset to be recalibrated with SIRC will benefit the further climate applications.

关键词： source complexity calibration

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CO2 monitoring spectrometer with 640x512 Pixel SWIR InGaAs focal plane array

CO2 monitoring spectrometer with 640x512 Pixel SWIR InGaAs f...

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2012 International Symposium on Photonics and Optoelectronics, SOPO 2012

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

ISBN: (纸本)9781457709111

This paper introduces a prototype grating spectrometer measuring atmospheric column carbon dioxide (CO2) with a 640x512 pixel indium gallium arsenide (InGaAs) focal plane array (FPA). The spectrometer achieves the spectral resolutions of 0.1 nm at 1.61μm CO2 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 640x512 InGaAs FPA with a low noise acquisition system serves to provide low noise spectral signals. The 640x512 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 5×1012 cm -1√Hz/W. © 2012 IEEE.

关键词： Carbon dioxide

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Design and simulation of image compensation control system

Design and simulation of image compensation control system

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2013 International Conference on Mechatronics and Automatic Control systems, ICMS 2013

作者： Tan, Chan Ding, Lei Key Laboratory of Infrared System Detection and Imaging Technology Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai China

ISBN: (纸本)9783319012728

Image compensation is a key to high resolution imaging. This paper designs and simulates an image compensation control system based on swing pointing mirror. The principle of pointing mirror compensation is presented and the mathematical model of pointing mirror's driving motor is established. Based on this model, a high accurate controller which consists of current loop and velocity loop is designed and simulated. Considering that there is disadvantage of traditional speed PID controller in dynamic performance, which is speed overshoot, the speed loop adopts pseudo derivative feed-forward (PDFF) controller. Theoretical analysis and simulation results show that the designed image compensation control system has good characteristic in following performance, dynamic response and noise resistance. © Springer International Publishing Switzerland 2014.

关键词： Controllers

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Atmospheric Pollution Monitoring Based on Fourier Transform infrared Spectrometer 2

Atmospheric Pollution Monitoring Based on Fourier Transform ...

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2nd International Conference on Optical imaging and Measurement, ICOIM 2023

作者： Sun, Jun Xu, Zhijing Lin, Yinghui Chen, Ren Wang, Zhanhu Shanghai Maritime University College of Information Engineering Shanghai China Shanghai Institute of Technical Physics State Key Laboratory of Infrared Physics Key Laboratory of Infrared System Detection and Imaging Technology Chinese Academy of Sciences Shanghai China

ISBN: (纸本)9798350358636

Air pollution has serious impacts on human health and the environment, thus accurate monitoring and analysis of air pollutants is of vital importance. As an efficient monitoring technology, the Fourier Transform infrared Spectrometer has played a wide role in the study of air pollution. This paper elaborates on the basic principles and working mechanisms of the Fourier Transform infrared Spectrometer and discusses the important role in air pollution monitoring, also analyzes the development trend of the Fourier Transform infrared Spectrometer in air monitoring. © 2023 IEEE.

关键词： Air pollution

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