公开(公告)号：US20240212336A1

公开(公告)日：2024-06-27

申请号：US18293704

申请日：2022-07-08

申请人： NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

发明人： Zhiqiang CHEN ,  Li ZHANG ,  Yunda SUN ,  Juan ZHENG ,  Lu WANG ,  Tao YANG ,  Dong LI

IPC分类号： G06V10/84 ,  G06T3/40 ,  G06T11/00 ,  G06V10/44 ,  G06V10/48

CPC分类号： G06V10/84 ,  G06T3/40 ,  G06T11/006 ,  G06V10/457 ,  G06V10/48 ,  G06T2211/428 ,  G06T2211/441 ,  G06V2201/05 ,  G06V2201/07 ,  G06V2201/12

摘要： A method and an apparatus of identifying at least one target object for a security inspection CT are provided. The method includes: performing a dimension reduction on three-dimensional CT data to generate a plurality of two-dimensional dimension-reduced views (S10); performing a target identification on a plurality of two-dimensional views to obtain a set of two-dimensional semantic descriptions of the at least one target object, where the plurality of two-dimensional views include the plurality of two-dimensional dimension-reduced views (S20); and performing a dimension increase on the set of two-dimensional semantic descriptions to obtain a three-dimensional recognition result of the at least one target object (S30).

公开(公告)号：US20170309043A1

公开(公告)日：2017-10-26

申请号：US15129455

申请日：2015-12-23

申请人： Tsinghua University ,  NUCTECH COMPANY LIMITED

发明人： Liang LI ,  Zhiqiang CHEN ,  Kejun KANG ,  Li ZHANG ,  Ziran ZHAO ,  Yuxiang XING ,  Yongshun XIAO ,  Jianping GU ,  Juan ZHENG

IPC分类号： G06T11/00 ,  G06T7/00

CPC分类号： G06T11/003 ,  G01N23/04 ,  G06T7/0002 ,  G06T11/008 ,  G06T2207/10081 ,  G06T2207/30112 ,  G06T2211/408

摘要： Disclosed is a dual-energy ray imaging method and system. The method comprises: calculating the mass thicknesses of the materials in the overlapped area of two materials by using a calibrated surface fitting method, and then decomposing a pair of original high-energy and low-energy data for this pixel into two high-low-energy data sets corresponding to the two materials, and finally calculating and acquiring the composition result of different materials for each pixel. The disclosure is especially advantageous in that the problem of error recognition of materials due to the two overlapped materials can be eliminated and the stratified imaging of multiple materials can be achieved, thereby improving the accuracy of the substance recognition and reducing the rate of false positive and false negative which is very important to the applications in the field of security check and anti-smuggling.

公开(公告)号：US20160103241A1

公开(公告)日：2016-04-14

申请号：US14892640

申请日：2014-01-17

申请人： TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

发明人： Kejun KANG ,  Jianmin LI ,  Ying LI ,  Yuanjing LI ,  Wei YIN ,  Juan ZHENG ,  Lei ZENG

IPC分类号： G01V5/00

CPC分类号： G01V5/0041 ,  G01V5/0025

摘要： The disclosure provides a multi-power multi-dosage accelerator. The multi-power multi-dosage accelerator comprises an electron gun configured to provide a first voltage of the electron gun and a second voltage of the electron gun, and an accelerating tube configured to generate a first X-ray having a first dosage and first power according to the first voltage of the electron gun and generate a second X-ray having a second dosage and second power according to the second voltage of the electron gun, wherein the first dosage is a dosage which can be accepted by human bodies and is much less than the second dosage, the first X-ray is used for inspecting a first area where a person is located, and the second X-ray is used for inspecting a second area where goods are located.

摘要翻译： 本公开提供了一种多功率多剂量加速器。 多功率多剂量促进剂包括电子枪，其被配置为提供电子枪的第一电压和电子枪的第二电压;以及加速管，被配置为产生具有第一剂量和第一功率的第一X射线 根据电子枪的第一电压，根据电子枪的第二电压生成具有第二剂量和第二功率的第二X射线，其中第一剂量是可被人体接受的剂量， 小于第二剂量时，第一X射线用于检查人的第一区域，并且第二X射线用于检查货物所在的第二区域。

公开(公告)号：US20170023697A1

公开(公告)日：2017-01-26

申请号：US15217787

申请日：2016-07-22

申请人： Tsinghua University ,  NUCTECH COMPANY LIMITED

发明人： Zhiqiang CHEN ,  Yuanjing LI ,  Li ZHANG ,  Ziran ZHAO ,  Yaohong LIU ,  Juan ZHENG ,  Jianping GU ,  Chunguang ZONG

IPC分类号： G01V5/00

CPC分类号： G01V5/0041 ,  G01N23/04 ,  G01N23/046 ,  G01N23/06 ,  G01N23/083 ,  G01N23/087 ,  G01N23/10 ,  G01V5/0016 ,  G01V5/005 ,  G01V5/12

摘要： Disclosed is a method and device for estimating weight of an object to be inspected in an inspection system. An effective atomic number and a high-energy gray value of the dual-energy corresponding to each pixel of the object to be inspected are obtained by a dual-energy radiation scanning. A mass-thickness value for a corresponding pixel is obtained from a pre-created mass-thickness attenuation curve by utilizing the effective atomic numbers and the high-energy gray value of the dual-energy for respective pixels. Weight information for at least a part of the object to be inspected is calculated by multiplying the mass-thickness value by the area of the pixel. Such a method may accurately calculate the weight of the object to be inspected and save the cost for a conventional weighing hardware.

摘要翻译： 公开了一种用于在检查系统中估计被检查物体的重量的方法和装置。 通过双能量辐射扫描获得与待检测对象的每个像素相对应的双能量的有效原子序数和高能灰度值。 通过利用有效原子序数和相应像素的双能量的高能量灰度值，从预先创建的质量厚度衰减曲线获得相应像素的质量厚度值。 通过将质量厚度值乘以像素的面积来计算待检查对象的至少一部分的重量信息。 这种方法可以精确地计算待检查物体的重量并节省常规称重硬件的成本。