公开(公告)号：US20190220958A1

公开(公告)日：2019-07-18

申请号：US16359990

申请日：2019-03-20

Applicant: Huazhong University of Science and Technology

Inventor： Tianxu ZHANG ,  Xuan HOU ,  Chuan ZHANG ,  Li LIU ,  Quan CHEN ,  Ao ZHONG ,  Mingxing XU ,  Yutian ZHOU

IPC: G06T5/00 ,  G06T5/10 ,  G06T5/20 ,  G06T5/40 ,  G06T7/136

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.

公开(公告)号：US20180350041A1

公开(公告)日：2018-12-06

申请号：US15577335

申请日：2016-04-13

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Tianxu ZHANG ,  Xuan HOU ,  Chuan ZHANG ,  Li LIU ,  Quan CHEN ,  Ao ZHONG ,  Mingxing XU ,  Yutian ZHOU

IPC: G06T5/00 ,  G06T5/40 ,  G06T5/10

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.

公开(公告)号：US20160370227A1

公开(公告)日：2016-12-22

申请号：US15104905

申请日：2015-02-10

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Tianxu ZHANG ,  Xiaobing DAI ,  Xiangyan LIU ,  Jindong FEI ,  Li LIU ,  Hongtao YU ,  Shoukui YAO

IPC: G01J3/02 ,  H04N5/232 ,  G01J3/28 ,  G01J3/45 ,  G01H9/00 ,  H04N5/33 ,  H04N5/225

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: The present invention discloses a moving platform infrared image-spectrum associated detection system, including 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. The image-spectrum associated detection processing module effectively merges infrared imaging and broadband spectral data, and the two-dimensional servo system is used to control a center orientation of the broadband optical system, thereby implementing target detection, tracking and spectrum measurement in a moving platform condition. The present invention can effectively isolate the system from disturbance of the moving platform, has the capability of simultaneously performing scene imaging, local area spectrum measurement, and multi-target tracking spectrum measurement, has a high speed and an adequate data amount, and has a broad application prospect.

Abstract translation: 本发明公开了一种移动平台红外图像相关检测系统，包括光学罩，宽带光学系统，二维伺服系统，红外光纤，傅里叶干涉光谱模块，图像相关检测处理 模块，电源模块和显示模块。 入射光从光学罩进入宽带光学系统，并被分光镜分离。 透射光通过长波成像透镜组聚焦在用于成像的红外检测器上。 反射光由宽带光谱透镜组聚焦到光纤耦合器，通过红外光纤进入傅里叶干涉光谱模块，形成干涉图案，进行傅里叶变换，得到光谱数据。 图像相关检测处理模块有效地融合了红外成像和宽带光谱数据，二维伺服系统用于控制宽带光学系统的中心定向，从而在移动平台中实现目标检测，跟踪和频谱测量 条件。 本发明可以有效地隔离系统与移动平台的干扰，具有同时执行场景成像，局域频谱测量和多目标跟踪频谱测量的能力，具有高速度和足够的数据量，并具有 广泛的应用前景。

公开(公告)号：US20160371851A1

公开(公告)日：2016-12-22

申请号：US15104921

申请日：2015-02-10

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Tianxu ZHANG ,  Xiangyan LIU ,  Xiaobing DAI ,  Li LIU ,  Hongtao YU

IPC: G06T7/20 ,  G06F17/30 ,  G02B13/14 ,  G01V8/10 ,  G06T7/00

CPC classification number: G01V8/10 ,  G01J3/0208 ,  G01J3/021 ,  G01J3/0294 ,  G01J3/2823 ,  G01J3/45 ,  G01J5/20 ,  G02B6/42 ,  G02B13/14 ,  G02B17/061 ,  G02B19/009 ,  G02B26/101 ,  G06F17/30259 ,  G06F17/3028 ,  G06K9/00624 ,  G06K9/2018 ,  G06K9/32 ,  G06K2009/00644 ,  G06T2207/10004 ,  G06T2207/10048

Abstract: The present invention discloses an infrared image-spectrum associated intelligent detection method and apparatus, including: first searching for targets in a field of view (FOV), and performing image-spectrum associated intelligent identification sequentially on the searched targets, that is, first performing infrared image target identification on each target, and if a detection identification rate is greater than a set threshold, outputting an identification result and storing target image data; otherwise, acquiring an infrared spectrum of the target, and performing target identification based on infrared spectrum features. The present invention further discloses an apparatus for performing target detection using the above method, and the apparatus mainly includes a two-dimensional scanning mirror, a multiband infrared optical module, a long-wave infrared (LWIR) imaging unit, a broadband infrared spectrum measuring unit, and a processing and control unit. The method and apparatus of the present invention are improvements and enhancements of the conventional infrared target detection method and device, and may be used for infrared image detection, infrared image-spectrum associated detection of the target and infrared spectrum collection of the target. Compared with the conventional infrared detection device, the present invention has a higher cost performance, and can significantly improve the detection identification rate of the target.

Abstract translation: 本发明公开了一种红外图像相关智能检测方法和装置，包括：首先在视场（FOV）中搜索目标，并在搜索到的目标上顺序执行图像频谱相关的智能识别，即，首先执行 每个目标上的红外图像目标识别，如果检测识别率大于设定的阈值，则输出识别结果并存储目标图像数据; 否则，获取目标的红外光谱，并且基于红外光谱特征执行目标识别。 本发明还公开了一种使用上述方法进行目标检测的装置，该装置主要包括二维扫描镜，多频带红外光学模块，长波红外（LWIR）成像单元，宽带红外光谱测量 单位和一个处理和控制单位。 本发明的方法和装置是传统的红外目标检测方法和装置的改进和改进，可以用于目标的红外图像检测，红外图像相关检测和目标的红外光谱采集。 与传统的红外线检测装置相比，本发明具有更高的性价比，可以显着提高目标的检测识别率。

公开(公告)号：US20160189349A1

公开(公告)日：2016-06-30

申请号：US14964559

申请日：2015-12-09

Applicant: Huazhong University of Science and Technology

Inventor： Tianxu ZHANG ,  Zheng WANG ,  Li HE ,  Li LIU ,  Xuan HOU ,  Chuan ZHANG ,  Sufei FAN ,  Yimeng CHEN

IPC: G06T5/00 ,  G06T5/40 ,  G06F17/30 ,  G06T5/20

CPC classification number: G06T5/002 ,  G06T5/10 ,  G06T7/11 ,  G06T7/136 ,  G06T7/155 ,  G06T2207/20056 ,  G06T2207/30184

Abstract: A de-noising method for remote images of ground buildings using spectrum constraints. The method includes: 1) obtaining a reference image of ground buildings from a remote image database of the ground buildings, performing a Fourier transformation on the reference image to obtain an amplitude spectrum, and performing a threshold segmentation, an erosion operation and a dilation operation successively on the amplitude spectrum to obtain a binary template of spectrum of the ground buildings; and 2) obtaining a real-time image of the ground buildings by a high-speed aircraft, performing a Fourier transformation on the real-time image to obtain a spectrum, filtering the spectrum of the real-time image in frequency domain by the binary template of spectrum of the ground buildings, and performing an inverse Fourier transformation thereon to generate a filtered real-time image of the ground buildings.

Abstract translation: 使用频谱约束的地面建筑物远距离图像的去噪方法。 该方法包括：1）从地面建筑物的远程图像数据库获取地面建筑物的参考图像，对参考图像进行傅立叶变换以获得振幅谱，并执行阈值分割，侵蚀操作和扩张操作 连续振幅谱，得到地面建筑物光谱二元模板; 和2）通过高速飞行器获得地面建筑物的实时图像，对实时图像进行傅立叶变换以获得频谱，通过二进制码对频域中的实时图像的频谱进行滤波 地面建筑物的光谱模板，并对其进行逆傅里叶变换，以产生地面建筑物的滤波实时图像。

公开(公告)号：US20180286017A1

公开(公告)日：2018-10-04

申请号：US15562887

申请日：2016-04-13

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Tianxu ZHANG ,  Chuan ZHANG ,  Xuan HOU ,  Li LIU ,  Quan CHEN ,  Ao ZHONG ,  Mingxing XU ,  Yutian ZHOU

IPC: G06T5/00 ,  G06T5/50 ,  G06T7/00

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.

公开(公告)号：US20160370562A1

公开(公告)日：2016-12-22

申请号：US15106699

申请日：2015-02-10

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Hong ZHANG ,  Jindong FEI ,  TIanxu ZHANG ,  Xiaobing DAI ,  XIangyan LIU ,  Li LIU

IPC: G02B17/08 ,  G01J3/28 ,  G02B27/14 ,  G02B1/11 ,  G02B13/14 ,  G02B27/00

CPC classification number: G02B17/0808 ,  G01J3/2823 ,  G02B1/11 ,  G02B7/182 ,  G02B13/146 ,  G02B27/0025 ,  G02B27/142

Abstract: The present invention discloses a co-aperture broadband infrared optical system, belonging to the field of infrared optical system. The system realizes long wave infrared (LWIR) imaging and broadband infrared spectrum measurement, and solves the problems of limited optical path layout, large volume and high cost of an optical system. The present invention includes a Cassegrain lens, a spectroscope, a reflector, several lens groups, an FPA interface and an optical fiber interface. Light (2 μm˜12 μm) is incident to the Cassegrain lens to be focused, then is split by the spectroscope, where 50% of the LWIR light (8 μm˜10 μm) passes through the lens group for aberration correction, and the image plane is focused again at the imaging interface. The other 50% of the LWIR light (8 μm˜10 μm) and the infrared reflected light (2 μm˜8 μm and 10 μm˜12 μm) pass through the lens group, and are reflected by the reflector, then focused at the optical fiber interface. The present invention is compact in overall structure and convenient and flexible to use, has relatively low cost, and can be integrated into an image-spectrum associated detection device to implement automatic detection and tracking, which can be widely used in civil and military fields such as environmental monitoring and infrared guidance.

Abstract translation: 本发明公开了一种属于红外光学系统领域的共孔宽带红外光学系统。 该系统实现长波红外（LWIR）成像和宽带红外光谱测量，解决了光学系统光路布局有限，体积大，成本高的问题。 本发明包括卡塞格伦透镜，分光镜，反射器，多个透镜组，FPA接口和光纤接口。 光（2μm〜12μm）入射到Cassegrain透镜进行聚焦，然后被分光镜分离，其中50％的LWIR光（8μm〜10μm）通过透镜组进行像差校正， 图像平面再次聚焦在成像界面。 另外50％的LWIR光（8μm〜10μm）和红外反射光（2μm〜8μm，10μm〜12μm）通过透镜组，被反射体反射，然后聚焦在 光纤接口。 本发明整体结构紧凑，使用方便灵活，成本相对较低，可以集成到图像相关检测装置中，实现自动检测和跟踪，可广泛应用于民用和军事领域 作为环境监测和红外线指导。

公开(公告)号：US20180293709A1

公开(公告)日：2018-10-11

申请号：US15576847

申请日：2016-04-13

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Tianxu ZHANG ,  Xuan HOU ,  Chuan ZHANG ,  Li LIU ,  Quan CHEN ,  Ao ZHONG ,  Mingxing XU ,  Yutian ZHOU

IPC: G06T5/00 ,  G06T5/10

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.