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公开(公告)号：US10074166B2
公开(公告)日：2018-09-11
申请号：US14700249
申请日：2015-04-30
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Kejun Kang , Zhiqiang Chen , Li Zhang , Ziran Zhao , Yaohong Liu , Jian Zhang , Jianping Gu , Qiang Li , Duokun Zhang
CPC classification number: G06T7/0004 , G01N23/04 , G01V5/0016 , G06K9/4604 , G06K9/4642 , G06K9/52 , G06K9/6215 , G06K9/6256 , G06K2009/4666
Abstract: The present disclosure discloses a method and system for inspecting cargoes. The method comprises: acquiring a transmission image of the inspected cargoes; processing the transmission image to acquire an interested region; extracting features from the interested region, and determining cargo information of the inspected cargoes according to the extracted features; and providing a proposed treatment suggestion of the cargoes based on the determined cargo information and at least a part of information in a manifest. The above solution can facilitate an image judgment person to accurately judge whether the concerned cargoes are allowed to pass.
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公开(公告)号：US20180182085A1
公开(公告)日：2018-06-28
申请号：US15827722
申请日：2017-11-30
Applicant: Nuctech Company Limited
Inventor： Ziran Zhao , Jianping Gu , Qian Yi , Bicheng Liu
CPC classification number: G06T7/001 , G01N23/04 , G01V5/0016 , G06T5/002 , G06T5/20 , G06T5/50 , G06T7/0004 , G06T7/74 , G06T2207/10028 , G06T2207/10116 , G06T2207/30112
Abstract: The present disclosure discloses an inspection device and a method for inspecting a container. Transmission scanning is performed on the inspected container using a scanning device including a sparse area array detector to obtain scan data. Digital focusing is performed at a specific depth position in a depth direction. Defocused pixel values are filtered out to obtain a slice image at the specific depth position. It is judged whether dangerous articles or suspicious articles are included in the slice image.
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公开(公告)号：US09978184B2
公开(公告)日：2018-05-22
申请号：US14540440
申请日：2014-11-13
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Zhiqiang Chen , Yuanjing Li , Ziran Zhao , Shuo Wang , Jianping Gu , Yunda Sun
CPC classification number: G06T19/20 , G06T7/0012 , G06T15/06 , G06T15/08 , G06T15/10 , G06T17/005 , G06T2207/10136 , G06T2210/12 , G06T2219/2021
Abstract: The present disclosure provides method and apparatus for marking a target in a 3D image. The method include steps of: acquiring Computed Tomography (CT) image data of a scene; rendering a 3D image of the scene using ray casting based on the CT image data; removing a transparent region from the 3D image based on a fixed 2D transfer function; and marking the target in the 3D image.
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公开(公告)号：US20180040115A1
公开(公告)日：2018-02-08
申请号：US15610930
申请日：2017-06-01
Applicant: Nuctech Company Limited
Inventor： Zhiqiang Chen , Yuanjing Li , Ziran Zhao , Yaohong Liu , Jianping Gu , Zhiming Wang
IPC: G06T7/00
CPC classification number: G06T7/0002 , G06T2207/20016 , G06T2207/20064 , G06T2207/30168
Abstract: A method and an apparatus for estimating an image fuzziness are provided. The method may comprise: acquiring an image; obtaining a mufti-scale representation of the image by performing a mufti-scale transform on the image; calculating gradients of the image and a normalized histogram of the gradients at each scale based on the multi-scale representation; calculating error vectors between the normalized histogram of gradients at each scale and a normalized original histogram of gradients of the image; performing a weighted summing on the error vectors by using respective weights to obtain a summed result, wherein the weights are determined based on a reciprocal of the sums of squares of the gradients of the image at each scale; estimating the ambiguity of the image based on the summed result.
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公开(公告)号：US11112528B2
公开(公告)日：2021-09-07
申请号：US16314093
申请日：2017-09-12
Applicant: Nuctech Company Limited
Inventor： Guangming Xu , Bicheng Liu , Ziran Zhao , Jianping Gu , Qiang Li , Lan Zhang
IPC: G01V5/00 , G01N23/087 , G01R23/18
Abstract: The present disclosure discloses a method of substance identification of an item to be inspected using a multi-energy-spectrum X-ray imaging system, the method comprising: acquiring a transparency related vector consisting of transparency values of the item to be inspected in N energy regions, wherein N is greater than 2; calculating distances between the transparency related vector and transparency related vectors stored in the system consisting of N transparency mean values of multiple kinds of items with multiple thicknesses in the N energy regions; and identifying the item to be inspected as the item corresponding to the minimum distance. The present disclosure is based on a multi-energy-spectrum X-ray imaging system, and proposes a method of substance identification by analyzing the multi-energy-spectrum substance identification issue. Compared with the conventional dual-energy X-ray system, the multi-spectrum imaging can significantly improve the system's ability to identify substances in theory, especially in the field of security applications. The improvement of substance identification is important for contraband inspection, such as, drugs, explosives.
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Patent Agency Ranking
26.发明授权公开(公告)号：US11022569B2
公开(公告)日：2021-06-01
申请号：US16029896
申请日：2018-07-09
Applicant: Nuctech Company Limited
Inventor： Kejun Kang , Zhiqiang Chen , Yuanjing Li , Li Zhang , Ziran Zhao , Yaohong Liu , Jianping Gu , Liang Li , Yuxiang Xing
IPC: G01N23/046 , G01V5/00
Abstract: A low-angle self-swinging type computed tomography (CT) device is provided, having an X-ray accelerator and a plurality of rows of detectors and includes a slip ring, such that the slip ring with the accelerator and the detectors thereon is capable of performing a single-pendulum reciprocating movement while an object to be inspected passes through the slip ring, a three-dimensional CT image of the object is displayed, thereby achieving accurate inspection for large-scale objects, such as van containers.
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公开(公告)号：US10796436B2
公开(公告)日：2020-10-06
申请号：US15913222
申请日：2018-03-06
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Chuanhong Huang , Qiang Li , Jianping Gu , Yaohong Liu , Ziran Zhao
Abstract: An inspection apparatus and a method for segmenting an Image of a vehicle are disclosed. An X-ray transmission scanning is performed on the vehicle to obtain a transmission image. Each pixel of the transmission image is labeled with a category tag, by using a trained convolutional network. Images of respective parts of the vehicle are determined according to the category tag for each pixel. With the above solutions, it is possible to segment the images of respective parts of a vehicle more accurately in the situations that are complicated or have large variety kinds of vehicles.
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公开(公告)号：US10670743B2
公开(公告)日：2020-06-02
申请号：US15606394
申请日：2017-05-26
Applicant: NUCTECH COMPANY LIMITED
Inventor： Lan Zhang , Yingshuai Du , Bo Li , Zonggui Wu , Jun Li , Xuepeng Cao , Haifan Hu , Jianping Gu , Guangming Xu , Bicheng Liu
Abstract: A semiconductor detector and a packaging method thereof. The semiconductor detector includes: a cathode circuit board including a read out chip, a high voltage side top layer of the cathode circuit board, a bottom connection layer of the cathode circuit board and a dielectric filled between the high voltage side top layer and the bottom connection layer, wherein the high voltage side top layer is connected to the bottom connection layer through a via hole; and a detector crystal including a crystal body, an anode and a cathode, the anode is connected to the read out chip of the cathode circuit board, the high voltage side top layer is connected to an input terminal of the semiconductor detector and the bottom connection layer directly contacts the cathode of the detector crystal to connect the cathode to the cathode circuit board.
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公开(公告)号：US10663413B2
公开(公告)日：2020-05-26
申请号：US15865520
申请日：2018-01-09
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Qiang Li , Jianping Gu , Bin Xu , Yaohong Liu , Ziran Zhao
IPC: G01N23/046 , G01V5/00 , G01N23/041
Abstract: A method for inspecting a container and an inspection device are disclosed. X-ray scanning is performed on the inspected container to obtain a scanned image. The scanned image is processed to obtain a region of interest. Features of texture units included in the region of interest are calculated. Local descriptions of the texture units are formed based on the features of the texture units. Distinction of each local point is calculated from a local description of each of the texture units so as to obtain a local distinct map of the region of interest. It is determined whether there is an article which is secretly carried in the inspected container using the local distinct map.
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公开(公告)号：US10388818B2
公开(公告)日：2019-08-20
申请号：US15625473
申请日：2017-06-16
Applicant: NUCTECH COMPANY LIMITED
Inventor： Lan Zhang , Yingshuai Du , Bo Li , Zonggui Wu , Jun Li , Xuepeng Cao , Haifan Hu , Jianping Gu , Guangming Xu , Bicheng Liu
IPC: H01L31/118 , G01T1/24 , G01T1/02 , H01L27/144 , H01L31/0224 , H01L31/028 , H01L31/0296 , H01L31/0304 , H01L31/032
Abstract: There is provided a semiconductor detector. According to an embodiment, the semiconductor detector may include a semiconductor detection material including a first side and a second side opposite to each other. One of the first side and the second side is a ray incident side that receives incident rays. The detector may further include a plurality of pixel cathodes disposed on the first side and a plurality of pixel anodes disposed on the second side. The pixel anodes and the pixel cathodes correspond to each other one by one. The detector may further include a barrier electrode disposed on a periphery of respective one of the pixel cathodes or pixel anodes on the ray incident side. According to the embodiment of the present disclosure, it is possible to effectively suppress charge sharing between the pixels and thus to improve an imaging resolution of the detector.
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