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公开(公告)号：US10157317B2
公开(公告)日：2018-12-18
申请号：US15278502
申请日：2016-09-28
Applicant: Nuctech Company Limited
Inventor： Zhiqiang Chen , Li Zhang , Jin Cui , Hong Wang , Huabin Tan , Dongxu Ji , Wenjing Wang , Tingting Zhang
IPC: H04N7/18 , H04N19/44 , G06K9/00 , G01V5/00 , G06K9/46 , G06T7/00 , H04N21/2187 , H04N21/61 , H04N21/845 , H04N19/29
Abstract: The present disclosure relates to a method, a system and a device for security inspection, pertaining to the field of security inspection. The method includes: before a baggage enters a security inspection machine and/or after the baggage leaves the security inspection machine, acquiring information about the baggage and information about a subject person; while the baggage is inside the security inspection machine to be scanned, acquiring a scanned image of the baggage; and correlating the information about the baggage, the scanned image of the baggage and the information about the subject person in a storage system, wherein acquiring information about the baggage and information about a subject person includes analyzing a video.
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公开(公告)号：US10102641B2
公开(公告)日：2018-10-16
申请号：US15204564
申请日：2016-07-07
Applicant: TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
Inventor： Zhiqiang Chen , Li Zhang , Ziran Zhao , Qingping Huang , Qiang Li , Jianping Gu , Yunda Sun
Abstract: Methods for extracting a shape feature of an object and security inspection methods and apparatuses. Use is made of CT's capability of obtaining a 3D structure. The shape of an object in an inspected luggage is used as a feature of a suspicious object in combination with a material property of the object. For example, a false alarm rate in detection of suspicious explosives may be reduced.
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公开(公告)号：US20180172604A1
公开(公告)日：2018-06-21
申请号：US15827739
申请日：2017-11-30
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Chunguang Zong , Ying Li , Hejun Zhou , Quanwei Song , Jianmin Li , Yulan Li , Yuanjing Li , Li Zhang , Zhiqiang Chen
CPC classification number: G01N21/9081 , G01N21/01 , G01N23/04 , G01V5/0016 , G01V5/0025
Abstract: A movable ray inspection system used to be mounted in a container yard to inspect an object within a container is provided. The movable ray inspection system includes: a ray generator device configured to emit a ray, a ray receiving device configured to receive the ray, and at least one chamber for receiving the ray generator device and the ray receiving device therein. Each of the at least one chamber is configured to be a standard container or a chamber which has a same shape, a same size and a same structure as a standard container such that the movable ray inspection system is adapted to be stacked in the container yard.
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公开(公告)号：US09947067B2
公开(公告)日：2018-04-17
申请号：US14753520
申请日：2015-06-29
Applicant: TSINGHUA UNIVERSITY , Nuctech Company Limited
Inventor： Zhiqiang Chen , Li Zhang , Ziran Zhao , Xianghao Wu , Limin Liu , Min Li , Xiaoming Song , Xinfang Huang , Ying Li
CPC classification number: G06T1/20 , G06F17/30861 , G06F17/30902 , G06T1/60
Abstract: The present disclosure provides a radiation image inspection system based on B/S architecture. The system comprises: at least one client terminal, configured to initiate an image operation request to a Web server, and display an image operation result on a browser of the client terminal upon receiving a response from the Web server; an image processing assembly, configured to query, based on the image operation request from the client terminal and forwarded by the Web server, an image which the client terminal desires to process, perform an operation on an image as requested by the client terminal, convert the resulted image into an image in a designated format and quality and return the converted image to the browser of the client terminal via the Web server for displaying; and the Web server, configured to receive the image operation request from the client terminal, forward the image operation request to the image processing assembly, and return the image operation result from the image processing assembly to the client terminal.
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135.发明申请公开(公告)号：US20170328844A1
公开(公告)日：2017-11-16
申请号：US15494884
申请日：2017-04-24
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Liang Li , Zhiqiang Chen , Kejun Kang , Li Zhang , Ziran Zhao , Yuxiang Xing , Jianmin Li , Yulan Li , Tiao Zhao
IPC: G01N23/087
CPC classification number: G01N23/087 , G01N23/046 , G01N2223/206 , G01N2223/419 , G01N2223/423
Abstract: Methods and system for decomposing a high-energy dual-energy X-ray CT material are disclosed. In the method, two types of effect such as Compton effect and electron pairing effect which dominates are reserved and the influence of the other effect such a photoelectric effect is removed so as to improve the accuracy of the material decomposition. The unique advantage of the present disclosure is to effectively remove the error of the calculated atomic number Z due to directly selecting two effects during processes of material decomposition in the conventional dual-energy CT method. This may greatly improve the accuracy of dual-energy CT identification of the material, and it is important to improve the conventional dual-use CT imaging system applications, such as clinical therapy, security inspection, industrial non-destructive testing, customs anti-smuggling and other fields.
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Patent Agency Ranking
公开(公告)号：US20170294118A1
公开(公告)日：2017-10-12
申请号：US15300947
申请日：2015-12-23
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Zhiqiang Chen , Li Zhang , Jianmin Li , Ziran Zhao , Yaohong Liu , Qiang Li , Zheng Hu , Jianping Gu , Ying Li
CPC classification number: G08G1/054 , G01V5/0008 , G01V5/0016 , G06K9/4604 , G06K9/4642 , G08G1/015 , G08G1/017
Abstract: Disclosed is a vehicle identification method and system. The method includes: acquiring appearance information of an inspected vehicle; obtaining external features of the vehicle based on the appearance information; acquiring a transmission image of the vehicle and obtaining internal features of the vehicle from the transmission image; forming descriptions on the vehicle at least based on the external features and the internal features; and determining a vehicle model of the vehicle from a vehicle model databased by utilizing the descriptions. This method merges various types of modality information, especially introducing the transmission image, and combines the internal structure information with the appearance information, so that the present disclosure can identify a vehicle model more practically.
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公开(公告)号：US09786041B2
公开(公告)日：2017-10-10
申请号：US14576705
申请日：2014-12-19
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Zhiqiang Chen , Li Zhang , Ji Zhao , Qingping Huang , Xin Jin
CPC classification number: G06T7/0002 , G01V5/005 , G06T2207/30112
Abstract: A CT system and method thereof are discloses. The system includes: a fixed multi-plane multi-source X-ray generation device and a control system thereof that provide X-ray source used in luggage inspection; a single-energy, pseudo-dual-energy or spectral detector system and data transfer system that receive perspective data of X ray penetrating the luggage, and transfer the data to a computer for processing; a conveyor and a control system thereof that control a speed for moving the luggage forth and back, and perform tomogram scanning; and a host computer system that performs tomogram reconstruction and provides man-machine interaction. The system takes full advantage of characteristics, such as high speed and stability, brought by the distributed ray sources which replace the normal slip ring technology. The system also adopts the idea of inverse-geometry CT, and reduces detector area and cost by increasing the number of ray sources. With the reduction of detector area, cone-beam artifacts and cup-shape artifacts caused by scattering are also reduced, and influence of the oblique effect on registration of dual-energy data is suppressed.
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公开(公告)号：US20170227476A1
公开(公告)日：2017-08-10
申请号：US15328437
申请日：2015-11-02
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Li Zhang , Zhiqiang CHEN , Xiaolei JIANG , Xiaohua ZHU , Xin JIN
IPC: G01N23/04
CPC classification number: G01N23/046 , G01N23/04 , G01N2223/3306 , G01N2223/401 , G01N2223/408 , G21K2207/005
Abstract: The present disclosure relates to X-ray imaging systems and methods. An exemplary system may comprise a distributed X-ray source arrangement, a fixed grating module, an X-ray detecting device, and a computer workstation. In one illustrative implementation, X-ray sources of the distributed incoherent X-ray source arrangement may sequentially generate and emit X-rays to an object to be detected. Further, for each exposure, the X-ray detecting device may receive the X-rays, wherein after a series of stepping exposures and corresponding data acquisitions, at each pixel of the X-ray detecting device, X-ray intensities are represented as an intensity curve; the intensity curve may be compared to an intensity curve in the absence of the object to be detected, and a pixel value at each pixel may be obtained from a variation of the intensity curves; and image information of the object to be detected may be obtained according to such pixel values.
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公开(公告)号：US09495772B2
公开(公告)日：2016-11-15
申请号：US14758795
申请日：2013-10-31
Applicant: NUCTECH COMPANY LIMITED , TSINGHUA UNIVERSITY
Inventor： Le Shen , Yuxiang Xing , Yuanji Li , Chuqing Feng , Li Zhang , Zhiqiang Chen
CPC classification number: G06T11/005 , A61B6/032 , A61B6/4241 , A61B6/4266 , A61B6/482 , A61B6/5205 , G01N23/046 , G01N2223/419 , G01T1/2985 , G06T5/50 , G06T2207/10081 , G06T2207/20182
Abstract: CT imaging systems and methods thereof are disclosed. A common CT scanning is performed on an object to obtain a common CT imaging. An area of interest is determined from the image. A CT scanning is performed on the area of interest under a plurality of energy windows by a photon counter detector. A high resolution image of the area of interest is reconstructed. The discrimination of energy spectrum is higher and the result so obtained is more stable by using a photon counter detector to collect photon count projection data of a plurality of energy windows and thus it may be decomposed into a plurality of basis functions.
Abstract translation: 公开了CT成像系统及其方法。 对物体执行常见的CT扫描以获得常见的CT成像。 根据图像确定感兴趣的区域。 通过光子计数器检测器在多个能量窗口下对感兴趣的区域进行CT扫描。 重建感兴趣区域的高分辨率图像。 通过使用光子计数器检测器来收集多个能量窗口的光子计数投影数据，能量谱的辨别较高，得到的结果更加稳定，因此可将其分解为多个基本函数。
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公开(公告)号：US09466137B2
公开(公告)日：2016-10-11
申请号：US14708866
申请日：2015-05-11
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Li Zhang , Zhiqiang Chen , Le Shen , Yuxiang Xing , Xin Jin , Qingping Huang
CPC classification number: G06T11/006 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/4266 , A61B6/5205 , G06T7/0012 , G06T2207/10081 , G06T2207/30004 , G06T2211/421
Abstract: The present disclosure discloses a spiral CT system and a reconstruction method thereof. In some embodiments, it is proposed that data missing due to a large pitch is compensated by weighting the complementary projection data of the projection data obtained using the spiral CT system. After the data is complemented, the projection data is rebinned as cone parallel beam data, cone-angle cosine weighting and one-dimensional filtering are implemented on the rebinned data, and parallel beam back projection is finally implemented on the filtered data, to obtain the reconstructed images. In some embodiments, with the above method, the speed of the belt can be increased by more than one time in a case that the existing area of the detectors and the existing speed of the slip ring are unchanged, thereby improving the pass rate of the luggage and maintaining the quality of the reconstructed images unchanged.
Abstract translation: 本公开公开了一种螺旋CT系统及其重建方法。 在一些实施例中，提出通过对使用螺旋CT系统获得的投影数据的互补投影数据进行加权来补偿由于大音调而丢失的数据。 数据补充后，将投影数据重新设置为锥形平行光束数据，对重定位数据进行锥角余弦加权和一维滤波，最后在滤波数据上实现平行光束反投影，获得 重建图像。 在一些实施例中，利用上述方法，在检测器的现有区域和滑环的现有速度不变的情况下，带的速度可以增加多于一次，从而提高了传感器的通过率 行李保持重建图像的质量不变。
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