公开(公告)号：US20240212336A1

公开(公告)日：2024-06-27

申请号：US18293704

申请日：2022-07-08

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

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

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

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

Abstract: 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：US20190094407A1

公开(公告)日：2019-03-28

申请号：US16037810

申请日：2018-07-17

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Li ZHANG ,  Zhiqiang CHEN ,  Le SHEN ,  Qingping HUANG ,  Yunda SUN ,  Xin JIN ,  Hui DING ,  Yuxiang XING

IPC: G01V5/00 ,  G01N23/046

Abstract: The disclosure provides a scanning imaging system for security inspection of an object and an imaging method thereof, the system comprising: a conveying unit configured for bringing the object to move along a conveying direction; a plurality of radiographic sources at one side of the conveying unit, being arranged successively in a direction vertical to a plane, in which the conveying unit is located, and configured for alternately emitting ray beams to form a scanning area; a linear detector array at the other side of the conveying unit, being configured for detecting first projection images, which are formed after the ray beams emitted by the plurality of radiographic sources penetrate through the object, in the process of the object passing through the scanning area; an imaging unit configured for obtaining a first reconstructed image of the object based on the first projection images of the plurality of radiographic sources.

公开(公告)号：US20170184757A1

公开(公告)日：2017-06-29

申请号：US15279239

申请日：2016-09-28

Applicant: CINTS CO. LTD. ,  NUCTECH COMPANY LIMITED

Inventor： Qitian MIAO ,  Zhiqiang CHEN ,  Li ZHANG ,  Ming HUANG ,  Yunda SUN ,  Ming HU ,  Qingping HUANG ,  Jie XIA ,  Lei LEI

IPC: G01V5/00

CPC classification number: G01V5/005 ,  G01V5/0041

Abstract: An inspection device for quarantine that includes a dual-energy CT apparatus capable of distinguishing substances, a DR apparatus, a substance identification system capable of enhancing display of an object (plant, animal, meat, etc.) focused for quarantine and automatically so labeling, and an image processing system capable of highlighting a suspect of quarantine and providing a corresponding automatic alarm. Compared to the prior art, the present disclosure can highlight a focused object for quarantine, which may improve accuracy and efficiency of inspection for quarantine at a port.

公开(公告)号：US20170176631A1

公开(公告)日：2017-06-22

申请号：US15300668

申请日：2015-12-15

Applicant: NUCTECH COMPANY LIMITED

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Shuo WANG ,  Yunda SUN ,  Qingping HUANG ,  Zhi TANG

IPC: G01V5/00 ,  G01N23/04

CPC classification number: G01V5/005 ,  G01N23/046 ,  G01N2223/401 ,  G01N2223/419 ,  G01N2223/643 ,  G01V5/0041 ,  G01V5/0058 ,  G06T11/008

Abstract: A method for positioning a target in a three-dimensional CT image and a security check system. The method includes: displaying a three-dimensional CT image; receiving a selection by a user of at least one area of the three-dimensional CT image at a first viewing angle to generate a first three-dimensional description; receiving a selection by the user of at least one area of the three-dimensional CT image at a second viewing angle to generate a second three-dimensional description, wherein an angle between the first viewing angle and the second viewing angle is within a predetermined range and the first three-dimensional description and the second three-dimensional description are related to a size, a location, and/or a physical property of a target at corresponding viewing angles; and determining the target in the three-dimensional CT image based on the first three-dimensional description and the second three-dimensional description.

公开(公告)号：US20150154809A1

公开(公告)日：2015-06-04

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

IPC: G06T19/20 ,  G06T15/10 ,  G06T15/06 ,  G06T7/00

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.

Abstract translation: 本公开提供了用于在3D图像中标记目标的方法和装置。 该方法包括以下步骤：获取场景的计算机断层扫描（CT）图像数据; 使用基于CT图像数据的射线投射来渲染场景的3D图像; 基于固定的2D传递函数从3D图像中去除透明区域; 并在3D图像中标记目标。

公开(公告)号：US20230350053A1

公开(公告)日：2023-11-02

申请号：US18139411

申请日：2023-04-26

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Ao ZHENG ,  Ji ZHAO ,  Hu TANG ,  Lei LEI ,  Shuo WANG ,  Yunda SUN

IPC: G01S13/88 ,  G06T5/50 ,  G06T7/62 ,  G06T7/70 ,  G06V10/74 ,  G06V20/70

CPC classification number: G01S13/887 ,  G06T5/50 ,  G06T7/62 ,  G06T7/70 ,  G06V10/761 ,  G06V20/70 ,  G06V2201/07 ,  G06T2207/20081 ,  G06T2207/20104 ,  G06T2207/20221

Abstract: Provided are a method and an apparatus of training a radiation image recognition model online and a method and an apparatus of recognizing a radiation image. Preset data is pre-stored in a radiation inspection system, and the preset data includes a first radiation image. The method of training radiation image recognition model online includes: collecting a second radiation image at the radiation inspection site; labeling the second radiation image online to form on-site collected data having a second labeling information, wherein the second labeling information is an incomplete labeling information of the second radiation image, and the second labeling information is used to indicate at least one of objects of interest in the second radiation image; synthesizing the preset data and the on-site collected data online to form a training data set; and training the radiation image recognition model online using the training data set.

公开(公告)号：US20220091051A1

公开(公告)日：2022-03-24

申请号：US17471725

申请日：2021-09-10

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Xiaofei XU ,  Le SHEN ,  Ming CHANG ,  Hu TANG ,  Xin JIN ,  Yunda SUN

IPC: G01N23/046 ,  G01N23/083

Abstract: A multi-channel static CT device is provided, and the multi-channel static CT device includes: a scanning channel including a plurality of scanning sub-channels; a distributed X-ray source including a plurality of ray emission points arranged around the scanning channel; and a detector module including a plurality of detectors arranged around the scanning channel, wherein the plurality of detectors are arranged corresponding to the plurality of ray emission points.

公开(公告)号：US20180173967A1

公开(公告)日：2018-06-21

申请号：US15822920

申请日：2017-11-27

Applicant: Nuctech Company Limited

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Gang PENG ,  Zhisheng DAI ,  Yunda SUN ,  Dong LI

IPC: G06K9/00 ,  G06K9/78 ,  G06K9/46 ,  G06T7/00

Abstract: The present disclosure relates to a security check system and method. The present disclosure provides a security check system for identifying objects of interest from multiple objects, comprising: an object-of-interest determining device for determining whether an object is an object of interest; an image mark applying device for acquiring images related to selected objects among the multiple objects and recording image marks of the selected objects; and a mark detecting device for detecting the image marks, wherein the security check system is configured to identify whether the object is the object of interest based on the detection of the mark detecting device and outputs a warning accordingly.

公开(公告)号：US20150206326A1

公开(公告)日：2015-07-23

申请号：US14540413

申请日：2014-11-13

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Ziran ZHAO ,  Li ZHANG ,  Zhiqiang CHEN ,  Shuo WANG ,  Jianping GU ,  Yunda SUN

IPC: G06T11/00 ,  G06T15/06 ,  G06T15/04 ,  G06T15/80 ,  G06T7/00 ,  G06T15/08 ,  G06T15/40 ,  G06T3/40 ,  G06T15/20 ,  G06T1/20 ,  G06T1/00 ,  G06T15/60

CPC classification number: G06T1/0007 ,  G06T1/20 ,  G06T3/403 ,  G06T11/001 ,  G06T11/008 ,  G06T15/04 ,  G06T15/06 ,  G06T15/08 ,  G06T15/205 ,  G06T15/405 ,  G06T15/60 ,  G06T15/80 ,  G06T2200/04 ,  G06T2200/08 ,  G06T2200/28 ,  G06T2207/10072 ,  G06T2207/10081 ,  G06T2210/04 ,  G06T2215/12 ,  G06T2219/2008

Abstract: The present disclosure provides a method for rendering of CT image data. The method includes acquiring 2D image data of a background and 2D image data of a target; rendering the 2D image data of the target into a 3D image of the target to obtain a first hit position of a ray; rendering the 2D image data of the background into a 3D image of the background; adjusting the 3D image of the background based on the first hit position; and synthetically rendering the 3D image of the background and the 3D image of the target. The present disclosure also provides apparatus for implementing the method.

Abstract translation: 本公开提供了一种用于呈现CT图像数据的方法。 该方法包括获取背景的2D图像数据和目标的2D图像数据; 将目标的2D图像数据呈现为目标的3D图像，以获得射线的第一命中位置; 将背景的2D图像数据呈现为背景的3D图像; 基于第一命中位置调整背景的3D图像; 并综合渲染背景的3D图像和目标的3D图像。 本公开还提供了用于实现该方法的装置。

公开(公告)号：US20150185357A1

公开(公告)日：2015-07-02

申请号：US14577069

申请日：2014-12-19

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Qingping HUANG ,  Yunda SUN ,  Xin JIN ,  Tao YANG ,  Le SHEN ,  Ji ZHAO

IPC: G01V5/00 ,  G01N23/04

CPC classification number: G01V5/0041 ,  G01N23/046 ,  G01T1/2985 ,  G01V5/005

Abstract: Multi-spectral static CT apparatuses are disclosed. The apparatus includes a ray source in a form of multiple distributed spots, multiple columns of detectors, a data acquisition device, an article carrying and control device, and a multi-spectral projection data processing device. An object of the present disclosure is to combine static CT scanning technology with multi-spectral analysis technology. It has an advantage of a static CT system, such as high scanning speed, simple mechanic structure, and/or cost reduction due to omission of slip ring. It also can perform identification of material in an article, and can be widely applied in occasions such as safety inspection, and smuggling suppression at customs.

Abstract translation: 公开了多光谱静态CT装置。 该装置包括多个分布点的形式的射线源，多列检测器，数据采集装置，物品携带和控制装置以及多光谱投影数据处理装置。 本公开的目的是将静态CT扫描技术与多光谱分析技术相结合。 它具有静电CT系统的优点，如扫描速度快，机械结构简单，和/或由于省略滑环而降低成本。 也可以在物品中进行材料鉴定，并可广泛应用于安全检查，海关走私等场合。