Patents by Inventor Weixian Li

Weixian Li 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: 11756333
    Abstract: Methods and systems are provided for determining a posture of a user of an Information Handling System (IHS). One or more cameras of the IHS are utilized to generate a two-dimensional image of the user as they operate the IHS. Landmarks that correspond to physical features of the user are identified through processing of the two-dimensional image generated using the cameras. A time-of-flight sensor of the IHS is utilized to generate a three-dimensional image of the user. The identified physical feature landmarks of the user are overlayed onto the three-dimensional image, thus allowing distances from the IHS to each of the landmarks to be determined. Based on the overlay of the physical feature landmarks onto the three-dimensional image a posture of the user relative to the IHS is determined. The posture may be scored based on the degree to which the user's posture deviates from an ergonomic posture.
    Type: Grant
    Filed: February 18, 2022
    Date of Patent: September 12, 2023
    Assignee: Dell Products, L.P.
    Inventors: Loo Shing Tan, Seng Khoon Teh, Ruizhi Joyce Lu, Weixian Li
  • Publication number: 20230267763
    Abstract: Methods and systems are provided for determining a posture of a user of an Information Handling System (IHS). One or more cameras of the IHS are utilized to generate a two-dimensional image of the user as they operate the IHS. Landmarks that correspond to physical features of the user are identified through processing of the two-dimensional image generated using the cameras. A time-of-flight sensor of the IHS is utilized to generate a three-dimensional image of the user. The identified physical feature landmarks of the user are overlayed onto the three-dimensional image, thus allowing distances from the IHS to each of the landmarks to be determined. Based on the overlay of the physical feature landmarks onto the three-dimensional image a posture of the user relative to the IHS is determined. The posture may be scored based on the degree to which the user's posture deviates from an ergonomic posture.
    Type: Application
    Filed: February 18, 2022
    Publication date: August 24, 2023
    Applicant: Dell Products, L.P.
    Inventors: Loo Shing Tan, Seng Khoon Teh, Ruizhi Joyce Lu, Weixian Li
  • Patent number: 8934721
    Abstract: The present disclosure provides a microscopic vision measurement method based on the adaptive positioning of the camera coordinate frame which includes: calibrating parameters of a microscopic stereo vision measurement model (201); acquiring pairs of synchronical images and transmitting the acquired images to a computer through an image acquisition card (202); calculating 3D coordinates of feature points in a scene according to the matched pairs of feature points in the scene obtained from the synchronical images and the calibrated parameters of the microscopic stereo vision measurement model (203); and performing specific measurement according to the 3D coordinates of the feature points in the scene (204). With the method, the nonlinearity of the objective function in the microscopic vision calibration optimization is effectively decreased and a better calibration result is obtained.
    Type: Grant
    Filed: April 25, 2011
    Date of Patent: January 13, 2015
    Assignee: Beihang University
    Inventors: Guangjun Zhang, Zhenzhong Wei, Weixian Li, Zhipeng Cao, Yali Wang
  • Publication number: 20130058581
    Abstract: The present disclosure provides a microscopic vision measurement method based on the adaptive positioning of the camera coordinate frame which includes: calibrating parameters of a microscopic stereo vision measurement model (201); acquiring pairs of synchronical images and transmitting the acquired images to a computer through an image acquisition card (202); calculating 3D coordinates of feature points in a scene according to the matched pairs of feature points in the scene obtained from the synchronical images and the calibrated parameters of the microscopic stereo vision measurement model (203); and performing specific measurement according to the 3D coordinates of the feature points in the scene (204). With the method, the nonlinearity of the objective function in the microscopic vision calibration optimization is effectively decreased and a better calibration result is obtained.
    Type: Application
    Filed: April 25, 2011
    Publication date: March 7, 2013
    Applicant: BEIHANG UNIVERSITY
    Inventors: Guangjun Zhang, Zhenzhong Wei, Weixian Li, Zhipeng Cao, Yali Wang