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    Three-dimensional data processing and recognizing method
    81.
    发明授权
    Three-dimensional data processing and recognizing method 有权
    三维数据处理和识别方法

    公开(公告)号：US09111128B2

    公开(公告)日：2015-08-18

    申请号：US14136426

    申请日：2013-12-20

    Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

    Inventor： Mingliang Li ,  Zhiqiang Chen ,  Yuanjing Li ,  Li Zhang

    IPC: G06K9/00

    CPC classification number: G06K9/00201 ,  G06K9/00771 ,  G06K2209/09

    Abstract: A three-dimensional data processing and recognizing method including scanning and re-constructing objects to be detected so as to obtain three-dimensional data for recognition of the objects to be detected; extracting data matching to features from the three-dimensional data, so that the extracted data constitutes an interested target; with respect to the data matching to features, merging and classifying adjacent data points as one group, to form an image of the merged interested target; recognizing a cross section of the interested target; cutting the interested targets by a perpendicular plane which passes through a central point of the cross section and is perpendicular to it, in order to obtain a graph; and recognizing shape of the interested targets based on a property of the graph.

    Abstract translation: 一种三维数据处理和识别方法，包括扫描和重新构造待检测对象，以获得用于识别待检测对象的三维数据; 从三维数据提取与特征匹配的数据，使提取的数据构成感兴趣的目标; 对于与特征匹配的数据，将相邻数据点合并和分类为一组，以形成合并的目标的图像; 认识到有兴趣的目标的横截面; 通过穿过横截面的中心点并垂直于其的垂直平面切割感兴趣的目标，以获得图形; 并基于图的属性识别感兴趣的目标的形状。

    CT SECURITY INSPECTION SYSTEM FOR BAGGAGE AND DETECTOR ARRANGEMENT THEREOF
    83.
    发明申请
    CT SECURITY INSPECTION SYSTEM FOR BAGGAGE AND DETECTOR ARRANGEMENT THEREOF 有权
    CT安全检查系统用于包装和检测器的安排

    公开(公告)号：US20140314200A1

    公开(公告)日：2014-10-23

    申请号：US14355240

    申请日：2013-07-15

    Applicant: NUCTECH COMPANY LIMITED

    Inventor： Zhiqiang Chen ,  Yuanjing Li ,  Li Zhang ,  Jinyu Zhang ,  Zhanjun Duan ,  Longsong Ran ,  Qingping Huang

    IPC: G01V5/00

    CPC classification number: G01V5/005 ,  A61B6/032 ,  A61B6/035 ,  G01N23/046 ,  G01V5/0016 ,  G01V5/0041

    Abstract: The present invention discloses a CT security inspection system for baggage. The CT security inspection system comprises a scanning passage through which a baggage enters and exits the CT security inspection system for baggage, a X-ray source provided at one side of the scanning passage, and, a gantry provided at an opposite side of the scanning passage, and on which a plurality of detector units are mounted. In each of the detector units, a vertex point of at least one detector unit is positioned in a circular arc with its center at a center of the scanning passage, and the detector units are arranged successively. All the detector crystal receiving faces of the plurality of detector units are within a scope of radiating ray beams with its center at a target of the X-ray source. In each of the detector units, a connection line between a midpoint of at least one of the detector crystal receiving faces and the target of the X-ray source is normal to the corresponding detector crystal receiving face.

    Abstract translation: 本发明公开了一种行李的CT安全检查系统。 CT安全检查系统包括扫描通道，行李通过该扫描通道进入和离开用于行李的CT安全检查系统，设置在扫描通道的一侧的X射线源，以及设置在扫描的相对侧的台架 通道，并且其上安装有多个检测器单元。 在每个检测器单元中，至少一个检测器单元的顶点定位在其中心在扫描通道的中心的圆弧中，并且检测器单元被连续布置。 多个检测器单元的所有检测器晶体接收面都在辐射射线束的范围内，其中心位于X射线源的目标。 在每个检测器单元中，检测器晶体接收面中的至少一个的中点与X射线源的目标之间的连接线垂直于相应的检测器晶体接收面。

    Data processing method and device
    89.
    发明授权
    Data processing method and device 有权

    公开(公告)号：US10955572B2

    公开(公告)日：2021-03-23

    申请号：US16137547

    申请日：2018-09-21

    Applicant: Tsinghua University ,  Nuctech Company Limited

    Inventor： Li Zhang ,  Zhiqiang Chen ,  Sen Wang ,  Xiaofei Xu ,  Yuanjing Li ,  Xin Jin

    IPC: G01T7/00 ,  G01T1/16 ,  G01T1/36

    Abstract: The present disclosure relates to a data processing method and device. The data processing method comprises steps of: performing detector response calibration based on a detector response obtained by an incidence of rays with known energy into a detector to obtain a detector response model; obtaining a photon counting model of the detector between incident energy spectrum data of the detector and detected energy spectrum data of the detector based on the detector response model; and performing a deconvolution operation on counts of photons in respective energy regions in the detected energy spectrum data of the detector based on the photon counting model of the detector, to obtain real counts of photons in respective energy regions in the incident energy spectrum data of the detector.

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