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.

公开(公告)号：US20180322358A1

公开(公告)日：2018-11-08

申请号：US16022666

申请日：2018-06-28

Applicant: NUCTECH COMPANY LIMITED

Inventor： Shangmin SUN ,  Yanwei Xu ,  Qiang Li ,  Weifeng Yu ,  Yu Hu

IPC: G06K9/32 ,  H04N5/33 ,  G06K9/00 ,  G06K9/20

CPC classification number: G06K9/3241 ,  G06K9/00201 ,  G06K9/00771 ,  G06K9/209 ,  H04N5/33

Abstract: A vehicle type recognition method based on a laser scanner is provided, the method comprising steps of: detecting that a vehicle to be checked has entered into a recognition area; causing a laser scanner to move relative to the vehicle to be checked; scanning the vehicle to be checked using the laser scanner on a basis of columns, and storing and splicing data of each column obtained by scanning to form a three-dimensional image of the vehicle to be checked, wherein a lateral width value is specified for each single column of data; specifying a height difference threshold; and determining a height difference between the height at the lowest position of the vehicle to be checked in data of column N and the height at the lowest position of the vehicle to be checked in data of specified number of columns preceding and/or succeeding to the column N.

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

IPC: G06T7/593 ,  G06T7/00 ,  G06K9/00 ,  G06K9/62 ,  G06T11/00 ,  G06T7/68

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.

公开(公告)号：US20180260959A1

公开(公告)日：2018-09-13

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

IPC: G06T7/143

CPC classification number: G06T7/143 ,  G06T7/11 ,  G06T2207/10116 ,  G06T2207/20081 ,  G06T2207/20084 ,  G06T2207/30248

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.

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

IPC: G08G1/054 ,  G08G1/017

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.

公开(公告)号：US20170160426A1

公开(公告)日：2017-06-08

申请号：US15030511

申请日：2015-07-24

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Jianmin Li ,  Lei Zeng ,  Qiang Li ,  Wen Wei

IPC: G01V5/00 ,  G06K7/10 ,  G06K9/62 ,  G01N23/04

CPC classification number: G01V5/0016 ,  G01N23/04 ,  G01N2223/401 ,  G01N2223/408 ,  G06K7/10366 ,  G06K9/00624 ,  G06K9/6201 ,  G06K2209/23

Abstract: A method for inspecting a vehicle includes acquiring a unique identity number of an insepected vehicle, carrying out X-ray scanning on the inspected vehicle to acquire an X-ray image of the inspected vehicle, retrieving at least one historical inspected image related to the unique identity number from a historical inspection database, determining, based on one template image selection algorithm selected from multiple template image selection algorithms, one of the at least one historical inspected images as a template image, determining a difference region between the X-ray image and the template image, and presenting the difference region to a user.

公开(公告)号：US09412019B2

公开(公告)日：2016-08-09

申请号：US14136462

申请日：2013-12-20

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Zhiqiang Chen ,  Li Zhang ,  Ziran Zhao ,  Qingping Huang ,  Qiang Li ,  Jianping Gu ,  Yunda Sun

IPC: G06K9/00 ,  G06T7/00 ,  G06T7/60

CPC classification number: G06T7/596 ,  G06K9/00201 ,  G06K9/00523 ,  G06K9/00536 ,  G06K9/6215 ,  G06K9/627 ,  G06K2209/09 ,  G06T7/0004 ,  G06T7/68 ,  G06T11/008 ,  G06T2207/10081 ,  G06T2207/30112 ,  G06T2211/408

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.

Abstract translation: 用于提取对象的形状特征的方法和安全检查方法和装置。 使用CT可以获得3D结构。 检查行李中的物体的形状被用作可疑物体的特征，与物体的材料属性相结合。 例如，可能会减少检测可疑炸药的误报率。