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公开(公告)号：US20180350041A1
公开(公告)日：2018-12-06
申请号：US15577335
申请日：2016-04-13
Inventor： Tianxu ZHANG , Xuan HOU , Chuan ZHANG , Li LIU , Quan CHEN , Ao ZHONG , Mingxing XU , Yutian ZHOU
CPC classification number: G06T5/00
Abstract: An aerothermal radiation effect frequency domain correction method, comprising: use a Gaussian surface to approximate a thermal radiation noise, perform a Fourier transform on the thermal radiation noise to obtain an amplitude spectrum, then normalize and segment the amplitude spectrum to obtain a filter thresholding template, BW, then use the filter thresholding template, BW, to construct a filter function, H; perform a Fourier transform on an image degraded by aerodynamic thermal radiation, f, to obtain a centralized frequency spectrum, F, then take the dot product of F and H to obtain a real-time image frequency spectrum, G; and perform an inverse Fourier transform on G to obtain a modulus, and acquire an image corrected for thermal radiation, g. Using the method effectively removes background noise generated by aerothermal radiation to restore a clear image, greatly improving image quality and image signal-to-noise ratio. The method further features reduced computational complexity and a shorter operation time, and is therefore better suited for real-time processing.
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Patent Agency Ranking
2.发明申请公开(公告)号：US20180293709A1
公开(公告)日：2018-10-11
申请号：US15576847
申请日：2016-04-13
Inventor： Tianxu ZHANG , Xuan HOU , Chuan ZHANG , Li LIU , Quan CHEN , Ao ZHONG , Mingxing XU , Yutian ZHOU
CPC classification number: G06T5/002 , G06T5/00 , G06T5/009 , G06T5/10 , G06T2207/20056
Abstract: An aerodynamic optical effect correction and identification integrated real-time processing system, comprising an FPGA module, a multi-core main processor DSP, a plurality of auxiliary processors ASICs and an infrared image non-uniformity correction system-on-chip (SoC). By means of the system, full-image thermal radiation correction, denoising, transmission effect correction and target detection processes of an aerodynamic optical effect degradation image are achieved. Correspondingly, provided is the corresponding method. The system effectively solves the problem of aerodynamic optical effect and the problem of the requirement for a short detection time interval of the processor in an aircraft flying at a high speed; due to the adoption of the independently researched and developed ASIC, the real-time property of the whole system is greatly improved; all tasks are rationally distributed and a multi-core parallel mode is adopted, so the image processing time is greatly shortened; and meanwhile, the FPGA module connects all units to form a closed-loop system, so that the system stability is further improved.
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公开(公告)号：US20190220958A1
公开(公告)日：2019-07-18
申请号：US16359990
申请日：2019-03-20
Inventor： Tianxu ZHANG , Xuan HOU , Chuan ZHANG , Li LIU , Quan CHEN , Ao ZHONG , Mingxing XU , Yutian ZHOU
Abstract: An aerothermal-radiation correction method, including: using a Gaussian surface to approximate a thermal radiation noise, performing a Fourier transform on the Gaussian surface so as to obtain a centralized spectrum of the thermal radiation noise, constructing a filter function H based on the centralized spectrum of the thermal radiation noise; performing a Fourier transform on the aerothermal-radiation degraded image f so as to obtain a centralized spectrum F, taking dot product of F and H to obtain a filtered spectrum G; and performing an inverse Fourier transform on filtered spectrum G to obtain a modulus, and acquire a corrected image. The method effectively removes background noise generated by aerothermal radiation, greatly improves image quality and image signal-to-noise ratio. The method features reduced computational complexity and a shorter operation time, and is suited for real-time processing.
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4.发明申请LOW-ORBIT SATELLITE-BORNE IMAGE-SPECTRUM ASSOCIATED DETECTION METHOD AND PAYLOAD 有权低轨卫星图像光谱相关检测方法和载荷公开(公告)号：US20160356650A1
公开(公告)日：2016-12-08
申请号：US15106696
申请日：2015-02-10
Inventor： Tianxu ZHANG , Zhihui YANG , Jiayu LIU , Yutian ZHOU , Shoukui YAO , Junqing ZHANG
CPC classification number: G01J3/28 , G01J3/0208 , G01J3/0289 , G01J3/0291 , G01J3/2823 , H01Q15/14
Abstract: The present invention discloses a low-orbit satellite-borne image-spectrum associated detection method and payload. The method includes: (1) detecting and tracking moving targets and dynamic phenomena based on a pixel offset compensation method; and (2) performing multi-dimensional characteristic analysis on infrared spectra of the moving targets and the dynamic phenomena, to identify the moving targets and the dynamic phenomena. The payload includes a two-dimensional servo turntable, an infrared reflector, a multispectral infrared optical system, an infrared imaging unit, a broadband infrared spectrum measuring unit, a data processing unit and a control unit. The present invention can achieve coaxiality of an infrared imaging optical path and a short/medium/long wave infrared spectrum measuring optical path, detect infrared image information and infrared spectra of moving targets and dynamic phenomena simultaneously and realize automatic detection, tracking, spectrum measurement and identification of multiple moving targets and dynamic phenomena in a scene, and has high identification efficiency and high tracking and positioning accuracy.
Abstract translation: 本发明公开了一种低轨道卫星传输的图像频谱相关检测方法和有效载荷。 该方法包括：（1）基于像素偏移补偿方法检测和跟踪移动目标和动态现象; （2）对运动目标的红外光谱和动态现象进行多维特征分析，识别移动目标和动态现象。 有效载荷包括二维伺服转台，红外反射器，多光谱红外光学系统，红外成像单元，宽带红外光谱测量单元，数据处理单元和控制单元。 本发明可以实现红外成像光路和短/中/长波红外光谱测量光路的同轴度，同时检测运动目标的红外图像信息和红外光谱和动态现象，实现自动检测，跟踪，光谱测量和 识别场景中的多个移动目标和动态现象，识别效率高，追踪定位精度高。
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公开(公告)号：US20190316908A1
公开(公告)日：2019-10-17
申请号：US16455812
申请日：2019-06-28
Inventor： Tianxu ZHANG , Yutian ZHOU , Zongyang CUI , Lei ZHANG , Shoukui YAO , Mingming QUE
Abstract: A master control system for a remote-sensing satellite image processing device, the system including: a master control management module, a first FPGA module, and a second FPGA module. The master control management module is in connection and communication with the first FPGA module, the second FPGA module, and a housekeeping computer. The first FPGA module is in connection and communication with the second FPGA module and a remote-sensing satellite image processing device. The master control management module is adapted to perform assignment of tasks. The first FPGA module is adapted to communicate with a processor in the satellite image processing device, monitor an operation state of the satellite image processing device, send the operation state information to the master control management module, receive a task assignment command issued by the master control management module, and transmit the task assignment command to the satellite image processing device.
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公开(公告)号：US20180286017A1
公开(公告)日：2018-10-04
申请号：US15562887
申请日：2016-04-13
Inventor： Tianxu ZHANG , Chuan ZHANG , Xuan HOU , Li LIU , Quan CHEN , Ao ZHONG , Mingxing XU , Yutian ZHOU
CPC classification number: G06T5/002 , G06T5/00 , G06T5/50 , G06T7/0002 , G06T2207/10048 , G06T2207/20024 , G06T2207/20182
Abstract: Disclosed in the present invention is a contrast constrained aerothermal radiation correction method. By analyzing features of images at different intensities of aerothermal radiation, it has been discovered that the stronger the aerothermal radiation effect is, the smaller the image contrast becomes, and when thermal radiation correction is performed using a gradient fitting algorithm, it has been discovered that time consumption thereof grows exponentially with an increase in a degree of a fitting surface and with an increase in an image size. The present invention can rapidly and effectively restore an aerothermal radiation image, remarkably improving a signal to noise ratio and quality of the image.
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