Patents by Inventor Yunda Sun

Yunda Sun has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11906447
    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.
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: February 20, 2024
    Assignees: NUCTECH COMPANY LIMITED, Tsinghua University
    Inventors: Zhiqiang Chen, Li Zhang, Xiaofei Xu, Le Shen, Ming Chang, Hu Tang, Xin Jin, Yunda Sun
  • Publication number: 20240037816
    Abstract: A method of training an image decomposition model, a method of decomposing an image, an electronic device, and a storage medium are provided. The method of training the image decomposition model includes: acquiring a training set; inputting first and second training images into first and second adversarial neural networks respectively, so as to determine a first loss function value; inputting a third training image into the first and second adversarial neural networks respectively, so as to determine a second loss function value; determining a third loss function value according to a comparison result between an acquired fusion image and the third training image, where the fusion image is generated by fusing generated images of the first and second adversarial neural networks, and adjusting a parameter of the image decomposition model according to at least one of the first to third loss function values.
    Type: Application
    Filed: July 21, 2023
    Publication date: February 1, 2024
    Inventors: Li ZHANG, Yunda SUN, Zheng HU, Gang FU, Qiang LI
  • Publication number: 20230350053
    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.
    Type: Application
    Filed: April 26, 2023
    Publication date: November 2, 2023
    Inventors: Zhiqiang CHEN, Li ZHANG, Ao ZHENG, Ji ZHAO, Hu TANG, Lei LEI, Shuo WANG, Yunda SUN
  • Patent number: 11768163
    Abstract: The present application discloses a CT system and a detection apparatus for the CT system. The detection apparatus includes: a high-energy detector assembly including a plurality of rows of high-energy detectors arranged along a predetermined trajectory; a low-energy detector assembly including a plurality of rows of low-energy detectors arranged at intervals along the predetermined trajectory, the low-energy detector assembly and the high-energy detector assembly being disposed in a stack; a number of rows of the low-energy detectors is smaller than a number or rows of the high-energy detectors; and each row of the low-energy detectors covers a row of high-energy detectors.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: September 26, 2023
    Assignees: Nuctech Company Limited, Tsinghua University
    Inventors: Li Zhang, Zhiqiang Chen, Qingping Huang, Yunda Sun, Xin Jin, Le Shen, Liang Li, Tiao Zhao
  • Publication number: 20230144433
    Abstract: Provided is a method of verifying an authenticity of declaration information. The method includes: acquiring a machine-detected radiation image obtained by scanning a container loaded with an article; acquiring a declaration information for declaring the article in the container; performing an identification on an image information of the article in the machine-detected radiation image to obtain an image feature corresponding to the machine-detected radiation image; performing an identification on a text information of the article in the declaration information to obtain a text feature corresponding to the declaration information; screening a declaration category of the article in the container by taking the image feature as an input information and the text feature as an external introduction feature; and determining that the declaration information is in doubt when a declaration category of at least one article in the container does not belong to a declaration category in the declaration information.
    Type: Application
    Filed: November 4, 2022
    Publication date: May 11, 2023
    Applicants: NUCTECH COMPANY LIMITED, Tsinghua University
    Inventors: Li ZHANG, Yuxiang XING, Hu TANG, Yunda SUN, Gang FU, Qiang LI, Yan ZHANG, Wubin WU
  • Publication number: 20230144259
    Abstract: The method includes: receiving an encoder signal and a ray machine output beam signal, and initially synchronizing the encoder signal and the ray machine output beam signal; recording coded value M of the encoder at moment tm, and coded value N of the encoder at moment tm+1, where M, N, and m are integers; determining that duration from the moment tm to the moment tm+1 is an actual output beam time interval T of the ray machine, when it is determined that a difference value between the coded value M and the coded value N satisfies preset value a, a being an integer; determining gap time TG in the actual output beam time interval T based on a preset output beam time interval TJ of the imaging system and the actual output beam time interval T; and controlling the ray machine not to emit beam within the gap time TG.
    Type: Application
    Filed: November 4, 2022
    Publication date: May 11, 2023
    Inventors: Zhiqiang CHEN, Li ZHANG, Yunda SUN, Zhenhua ZHAO, Xin JIN, Le SHEN, Wuyang LIANG
  • Patent number: 11340177
    Abstract: Disclosed are calibration assembly and calibration method of calibrating geometric parameters of a CT apparatus. The calibration assembly includes at least one calibration unit each including a plurality of calibration wires, and the plurality of calibration wires are arranged regularly in a same plane. The calibration assembly is easy to be processed and can be used to calibrate geometric parameters of a CT apparatus, and the calibration operations are simple and easy to be implemented.
    Type: Grant
    Filed: January 20, 2020
    Date of Patent: May 24, 2022
    Assignees: Nuctech Company Limited, Tsinghua University
    Inventors: Zhiqiang Chen, Li Zhang, Zhenhua Zhao, Yunda Sun, Xin Jin, Wuyang Liang
  • Publication number: 20220091051
    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.
    Type: Application
    Filed: September 10, 2021
    Publication date: March 24, 2022
    Inventors: Zhiqiang CHEN, Li ZHANG, Xiaofei XU, Le SHEN, Ming CHANG, Hu TANG, Xin JIN, Yunda SUN
  • Publication number: 20220042929
    Abstract: The present application discloses a CT system and a detection apparatus for the CT system. The detection apparatus includes: a high-energy detector assembly including a plurality of rows of high-energy detectors arranged along a predetermined trajectory; a low-energy detector assembly including a plurality of rows of low-energy detectors arranged at intervals along the predetermined trajectory, the low-energy detector assembly and the high-energy detector assembly being disposed in a stack; a number of rows of the low-energy detectors is smaller than a number or rows of the high-energy detectors; and each row of the low-energy detectors covers a row of high-energy detectors.
    Type: Application
    Filed: September 10, 2019
    Publication date: February 10, 2022
    Applicants: Nuctech Company Limited, Tsinghua University
    Inventors: Li ZHANG, Zhiqiang CHEN, Qingping HUANG, Yunda SUN, Xin JIN, Le SHEN, Liang Ll, Tiao ZHAO
  • Publication number: 20210223188
    Abstract: Disclosed are calibration assembly and calibration method of calibrating geometric parameters of a CT apparatus. The calibration assembly includes at least one calibration unit each including a plurality of calibration wires, and the plurality of calibration wires are arranged regularly in a same plane. The calibration assembly is easy to be processed and can be used to calibrate geometric parameters of a CT apparatus, and the calibration operations are simple and easy to be implemented.
    Type: Application
    Filed: January 20, 2020
    Publication date: July 22, 2021
    Inventors: Zhiqiang Chen, Li Zhang, Zhenhua Zhao, Yunda Sun, Xin Jin, Wuyang Liang
  • Patent number: 10942290
    Abstract: The present application discloses an X-ray detection system and method. The detection system includes: a beam source generator, first detectors, a second detector, a collimating device and a processor. The first detectors and the second detector are alternately arranged in a transmission direction of an object to be detected. The beam source generator emits a plurality of columns of beam signals, wherein each column of beam signals comprises a plurality of beam signals; the first detectors receive a plurality of columns of transmitted beam signals passing through the object; the collimating device performs a specificity selection from a plurality of columns of scattered beam signals passing through the object; the second detector receives scattered beam signals selected by the collimating device; and the processor determines a detection result of the object according to the plurality of columns of transmitted beam signals and the selected scattered beam signals.
    Type: Grant
    Filed: May 16, 2019
    Date of Patent: March 9, 2021
    Assignee: Nuctech Company limited
    Inventors: Li Zhang, Zhiqiang Chen, Yunda Sun, Xin Jin, Ming Chang, Xiaofei Xu
  • Patent number: 10810437
    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.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: October 20, 2020
    Assignee: Nuctech Company Limited
    Inventors: Zhiqiang Chen, Li Zhang, Gang Peng, Zhisheng Dai, Yunda Sun, Dong Li
  • Publication number: 20200200941
    Abstract: The present application discloses an X-ray detection system and method. The detection system includes: a beam source generator, first detectors, a second detector, a collimating device and a processor. The first detectors and the second detector are alternately arranged in a transmission direction of an object to be detected. The beam source generator emits a plurality of columns of beam signals, wherein each column of beam signals comprises a plurality of beam signals; the first detectors to receive a plurality of columns of transmitted beam signals passing through the object; the collimating device performs a specificity selection from a plurality of columns of scattered beam signals passing through the object; the second detector receives scattered beam signals selected by the collimating device; and the processor determines a detection result of the object according to the plurality of columns of transmitted beam signals and the selected scattered beam signals.
    Type: Application
    Filed: May 16, 2019
    Publication date: June 25, 2020
    Inventors: Li Zhang, Zhiqiang Chen, Yunda Sun, Xin Jin, Ming Chang, Xiaofei Xu
  • Patent number: 10634810
    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.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: April 28, 2020
    Assignees: Nuctech Company Limited, Tsinghua University
    Inventors: Li Zhang, Zhiqiang Chen, Le Shen, Qingping Huang, Yunda Sun, Xin Jin, Hui Ding, Yuxiang Xing
  • Patent number: 10436932
    Abstract: The present disclosure discloses an inspection system for quarantine and a method thereof. The CT technology is applied to the field of quarantine supervision, overcoming a problem of objects in an image of a single-view or a multi-view X-ray machine being overlapped, as well as a problem of organics including contrabands in a conventional CT image being not highlighted, not elaborated, and having bad contrast. Accuracy and efficiency of inspecting an object by human operator for quarantine inspection can be considerably improved, which is of a high application value.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: October 8, 2019
    Assignees: NUCTECH COMPANY LIMITED, CINTS CO., LTD.
    Inventors: Qitian Miao, Zhiqiang Chen, Li Zhang, Yunda Sun, Ming Huang, Qingping Huang, Ming Hu, Lei Lei, Jie Xia
  • Patent number: 10416344
    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.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: September 17, 2019
    Assignees: CINTS CO. LTD., NUCTECH COMPANY LIMITED
    Inventors: Qitian Miao, Zhiqiang Chen, Li Zhang, Ming Huang, Yunda Sun, Ming Hu, Qingping Huang, Jie Xia, Lei Lei
  • Patent number: 10371648
    Abstract: The present disclosure discloses a radiography system including: a ray source, comprising a plurality of X-ray generators which are distributed on one or more planes intersected with a moving direction of an object being inspected; a detector module comprising a plurality of detection units; a data collection circuit; a controller, configured to control at least two X-ray generators of the plurality of X-ray generators in the ray source to generate X-rays alternately such that the object is scanned by the generated X-rays; and control the detector module and the data collection circuit to respectively obtain detection data corresponding to the at least two X-ray generators; and a data processing computer, configured to create images of the object being inspected in view angles of the at least two X-ray generators based on the detection data.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: August 6, 2019
    Assignee: NUCTECH COMPANY LIMITED
    Inventors: Li Zhang, Xin Jin, Huaping Tang, Qingping Huang, Yunda Sun, Zhiqiang Chen
  • Patent number: 10353110
    Abstract: The present disclosure provides a method and device for operating a CT-based three-dimensional image used for security inspection. The method includes: providing a CT-based three-dimensional image used for security inspection; accepting a selection of an image of an object in the three-dimensional image; and responding to the selection. The present disclosure has strong practicality, and can provide effective reference information for image judgment in the CT-based security inspection field.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: July 16, 2019
    Assignees: TSINGHUA UNIVERSITY, Nuctech Company Limited
    Inventors: Li Zhang, Shuo Wang, Yunda Sun, Qingping Huang
  • Patent number: 10338011
    Abstract: The present disclosure relates to multi-modality detection systems and methods. One illustrative multi-modality detection system may include a distributed radiation source configured to irradiate an object under detection, a primary collimator configured to separate rays of the distributed radiation source into two parts, wherein one part is for CT detection and the other part is for XRD detection, a CT detection device configured to perform a CT detection to acquire a CT image of the object under detection, and an XRD detection device configured to perform an XRD detection to acquire an XRD image of the object under detection, wherein the CT detection and the XRD detection are performed simultaneously.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: July 2, 2019
    Assignees: Tsinghua University, Nuctech Company Limited
    Inventors: Zhiqiang Chen, Li Zhang, Tianyi Yang Dai, Qingping Huang, Yunda Sun, Xin Jin
  • Patent number: 10297050
    Abstract: Disclosed is a method for positioning a target in a three-dimensional CT image and a CT system for security inspection. 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 viewing angle; generating at least one set of three-dimensional objects in a depth direction based on the selection; and determining a target object from the set. With the above technical solutions, the user may be facilitated in marking a suspected object in a CT image in a quick manner.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: May 21, 2019
    Assignee: NUCTECH COMPANY LIMITED
    Inventors: Zhiqiang Chen, Li Zhang, Shuo Wang, Yunda Sun, Qingping Huang, Zhi Tang