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公开(公告)号：US11162847B2
公开(公告)日：2021-11-02
申请号：US16458221
申请日：2019-07-01
Inventor： Tianxu Zhang , Fenglin Wang , Shoukui Yao , Lei Lu , Xu Cheng
Abstract: A method of attitude estimation of a spotted target. The method includes an offline training and an online estimation. The offline training includes establishing a three-dimensional geometric model of a target, performing region division according to the structure of the target, establishing an object-space temperature distribution model for each region of the target, establishing an infrared radiation transmission model of an intra-atmospheric target in six attitudes in observation by a detection system, constructing an image-space radiant energy model of the target in the six attitudes using the object-space temperature distribution model and the infrared radiation transmission model, and performing simulation calculation to obtain an infrared spectral curve of the spotted target regarding wavelength versus image-space-radiant-energy-of-target, so as to establish a mapping database regarding target-attitude versus spectrum.
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公开(公告)号：US10521888B2
公开(公告)日：2019-12-31
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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23.发明授权公开(公告)号：US10365399B2
公开(公告)日：2019-07-30
申请号：US15106703
申请日：2014-09-02
Inventor： Tianxu Zhang , Wenxuan Ma , Cen Lu , Longwei Hao , Yuehuan Wang , Nong Sang , Weidong Yang , Hu Zhu
Abstract: The present invention provides a method for infrared imaging detection and positioning of an underground tubular facility in a plane terrain. Demodulation processing is performed on an original infrared image formed after stratum modulation is generated on the underground tubular facility according to an energy diffusion Gaussian model of the underground tubular facility, so as to obtain a target image of the underground tubular facility. The method comprises: obtaining an original infrared image g formed after stratum modulation is generated on an underground tubular facility; setting an initial value h0 of a Gaussian thermal diffusion function according to the original infrared image g; using the original infrared image g as an initial target image f0, and performing, according to the initial value h0 of the Gaussian thermal diffusion function, iteration solution of a thermal diffusion function hn and a target image fn by by using a single-frame image blind deconvolution method based on a Bayesian theory; and determining whether an iteration termination condition is met, and if the iteration termination condition is met, determining that the target image fn obtained by means of iteration solution this time is a final target image f; and if the iteration termination condition is not met, continuing the iteration calculation. By means of the method, the display of the infrared image of the original underground tubular facility is clearer, and the real structure of the underground tubular facility can also be inverted.
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24.发明授权公开(公告)号：US10297013B2
公开(公告)日：2019-05-21
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
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：US09921102B2
公开(公告)日：2018-03-20
申请号：US15104905
申请日：2015-02-10
Inventor： Tianxu Zhang , Xiaobing Dai , Xiangyan Liu , Jindong Fei , Li Liu , Hongtao Yu , Shoukui Yao
CPC classification number: G01J3/0202 , G01H9/004 , G01J3/0208 , G01J3/021 , G01J3/0218 , G01J3/0264 , G01J3/2823 , G01J3/45 , G01J2003/2836 , H04N5/2251 , H04N5/2252 , H04N5/2254 , H04N5/23241 , H04N5/33
Abstract: A moving platform borne infrared image-spectrum associated detection system includes an optical hood, a broadband optical system, a two-dimensional servo system, an infrared optical fiber, a Fourier interference spectrum module, an image-spectrum associated detection processing module, a power supply module, and a display module. Incident light enters from the optical hood to the broadband optical system, and is split by a spectroscope. Transmitted light is focused by a long-wave imaging lens group on an infrared detector for imaging. Reflected light is focused by a broadband spectrum lens group to an optical fiber coupler, enters the Fourier interference spectrum module through the infrared optical fiber to form an interference pattern, and undergoes Fourier transform to obtain spectral data.
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Patent Agency Ranking
公开(公告)号：US09741120B2
公开(公告)日：2017-08-22
申请号：US15105456
申请日：2014-09-02
Inventor： Tianxu Zhang , Longwei Hao , Cen Lu , Wenxuan Ma , Yuehuan Wang , Nong Sang , Weidong Yang
CPC classification number: G06T7/70 , G01J5/10 , G01J2005/0077 , G06T5/001 , G06T2207/10048 , G06T2207/20076
Abstract: An infrared imaging detection and positioning method for an underground building in a planar land surface environment comprises: obtaining an original infrared image g0 formed after stratum modulation is performed on an underground building, and determining a local infrared image g of a general position of the underground building in the original infrared image g0; setting an iteration termination condition, and setting an initial value h0 of a Gaussian thermal diffusion function; using the local infrared image g as an initial target image f0, and performing iteration solution of a thermal expansion function hn and a target image fn by using a maximum likelihood estimation algorithm according to the initial value h0 of the Gaussian thermal diffusion function; and determining whether the iteration termination condition is met, if the iteration termination condition is met, using the target image fn obtained by means of iteration solution this time as a final target image f; and if the iteration termination condition is not met, continuing to perform iteration calculation. In the method, by performing demodulation processing on the infrared image formed after stratum modulation is performed on the underground building, the display of the infrared image of the original underground building is clearer, and the real structure of the underground building can be inverted.
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27.发明授权Method for separating and estimating multiple motion parameters in X-ray angiogram image 有权X射线血管造影图像中分离和估计多个运动参数的方法公开(公告)号：US09286676B2
公开(公告)日：2016-03-15
申请号：US14698894
申请日：2015-04-29
Inventor： Tianxu Zhang , Yining Huang , Zhenghua Huang , Yaxun Wei , Longwei Hao
CPC classification number: G06T7/0012 , G06T5/50 , G06T7/20 , G06T7/246 , G06T7/262 , G06T2207/10116 , G06T2207/20224 , G06T2207/30048 , G06T2207/30101 , G06T2211/404
Abstract: A method for separating and estimating multiple motion parameters in an X-ray angiogram image. The method includes: determining a cardiac motion signal cycle and a variation frame sequence of translational motion according to an angiogram image sequence, tracing structure feature points of vessels in the angiogram image sequence whereby obtaining a motion sequence, processing the motion sequence via multivariable optimization and Fourier frequency-domain filtering, separating an optimum translational motion curve, a cardiac motion curve, a respiratory motion curve and a high-frequency motion curve according to the variation frame sequence of translational motion, a cycle of the cardiac motion signal, a range of a respiratory motion signal cycle, and a range of a high-frequency motion signal cycle.
Abstract translation: 一种用于在X射线血管造影图像中分离和估计多个运动参数的方法。 该方法包括：根据血管造影图像序列确定心脏运动信号循环和平移运动的变化帧序列，跟踪血管造影图像序列中血管的结构特征点，从而获得运动序列，通过多变量优化处理运动序列;以及 傅里叶频域滤波，根据平移运动的变化帧序列分离最佳平移运动曲线，心脏运动曲线，呼吸运动曲线和高频运动曲线，心脏运动信号的周期， 呼吸运动信号周期以及高频运动信号周期的范围。
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公开(公告)号：US08995162B2
公开(公告)日：2015-03-31
申请号：US14135617
申请日：2013-12-20
Inventor： Hongshi Sang , Wen Wang , Tianxu Zhang , Chaobing Liang , Jing Zhang , Yang Xie , Yajing Yuan
IPC: G11C5/06
CPC classification number: G11C11/4125
Abstract: A radiation-hardened memory storage unit that is resistant to total ionizing done effects, the unit including PMOS transistors.
Abstract translation: 辐射硬化的存储单元，耐整个电离完成效果，该单元包括PMOS晶体管。
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29.发明授权Method for restoring and enhancing space based image of point or spot objects 有权用于恢复和增强点或点对象的基于空间的图像的方法公开(公告)号：US08737761B2
公开(公告)日：2014-05-27
申请号：US13731100
申请日：2012-12-30
Inventor： Tianxu Zhang , Daolong Wu , Jianchong Chen , Jing Guan , Zheng Yu , Hao Chen , Zhiyong Zuo , Putao Zhang
IPC: G06K9/40
CPC classification number: G06T5/003 , G06T2207/10032 , G06T2207/20021 , G06T2207/30181
Abstract: A method for restoring and enhancing a space based image of point or spot objects. The method includes: 1) dividing a space-variable degraded image into multiple space-invariant image sub-blocks, and constructing a point spread function for each of the image sub-blocks; 2) correcting each of the image sub-blocks via a space-invariant image correction method whereby obtaining a corrected image {circumflex over (f)}i for each of the image sub-blocks; and 3) stitching the corrected image sub-blocks {circumflex over (f)}i altogether via a stitching algorithm whereby obtaining a complete corrected image {circumflex over (f)}.
Abstract translation: 一种用于恢复和增强点或点对象的基于空间的图像的方法。 该方法包括：1）将空间变异退化图像划分为多个空间不变图像子块，并为每个图像子块构建点扩散函数; 2）通过空间不变图像校正方法校正每个图像子块，从而获得每个图像子块的校正图像{（f）} i的旋转; 并且3）通过拼接算法拼接校正图像子块（在（f）} i上的旋转），从而获得完整的校正图像{（f）}。
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公开(公告)号：US12282132B2
公开(公告)日：2025-04-22
申请号：US18148472
申请日：2022-12-30
Inventor： Tianxu Zhang , Yuhai Lv , Jiawei Wang , Qinghui Zhang , Cheng Yang , Tao Zhang , Jiandong Tan
Abstract: A sequence time window amplitude-phase-frequency characteristics analysis method and system for underwater vehicle power frequency electromagnetic field disturbance are provided. The method includes: establishing a power grid dipole group model, emulating and calculating to obtain background field intensity data of a test location, and constructing an emulated background field database; acquiring measured background field data, comparing the emulated data with the measured data, and providing a relative error; calculating a background field intensity and underwater vehicle target disturbance under the action of the above dipole group, and establishing a measured target signal database; and performing actual measurement according to an underwater vehicle motion and detection topology, performing a Fourier transform and Fourier sliding window decomposition after acquiring original data, and acquiring an amplitude spectrum and a spectrogram of an underwater vehicle target disturbance signal.
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