Patents by Inventor Zihao Cai

Zihao Cai 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).

  • Method and apparatus for identifying pupil in image
    Patent number: 10755081
    Abstract: A method and device for identifying a pupil in an image is provided. The method comprises four steps including: A. image preprocessing, B. edge detecting, C. building connected graphs, and D. screening connected graph pairs.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: August 25, 2020
    Assignee: CHINA UNIONPAY CO., LTD.
    Inventors: Liang Feng, Zihao Cai, Yawei Yin
  • Eyeball tracking method and apparatus, and device
    Patent number: 10699420
    Abstract: An eyeball tracking method and apparatus, and a device. The method comprises: acquiring a facial grey-scale image set to be detected (101); judging whether the contour of an eyeball iris is determined in an N-th frame facial grey-scale image in the facial grey-scale image set to be detected (102); if not, detecting an eyeball pupil in the N-th frame facial grey-scale image, and determining the central position of the eyeball pupil in the N-th frame facial grey-scale image (103); in the N-th frame facial grey-scale image, taking the central position of the eyeball pupil as a centre to determine a grey-scale image region corresponding to an eyeball window (104); and according to the grey-scale image region corresponding to the eyeball window, determining the contour of the eyeball iris in the N-th frame facial grey-scale image (105).
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: June 30, 2020
    Assignee: CHINA UNIONPAY CO., LTD.
    Inventors: Zihao Cai, Liang Feng
  • EYEBALL TRACKING METHOD AND APPARATUS, AND DEVICE
    Publication number: 20180365844
    Abstract: An eyeball tracking method and apparatus, and a device. The method comprises: acquiring a facial grey-scale image set to be detected (101); judging whether the contour of an eyeball iris is determined in an N-th frame facial grey-scale image in the facial grey-scale image set to be detected (102); if not, detecting an eyeball pupil in the N-th frame facial grey-scale image, and determining the central position of the eyeball pupil in the N-th frame facial grey-scale image (103); in the N-th frame facial grey-scale image, taking the central position of the eyeball pupil as a centre to determine a grey-scale image region corresponding to an eyeball window (104); and according to the grey-scale image region corresponding to the eyeball window, determining the contour of the eyeball iris in the N-th frame facial grey-scale image (105).
    Type: Application
    Filed: November 30, 2016
    Publication date: December 20, 2018
    Inventors: Zihao CAI, Liang FENG
  • METHOD AND APPARATUS FOR IDENTIFYING PUPIL IN IMAGE
    Publication number: 20180322332
    Abstract: A method and device for identifying a pupil in an image is provided. The method comprises four steps including: A. image preprocessing, B. edge detecting, C. building connected graphs, and D. screening connected graph pairs.
    Type: Application
    Filed: November 4, 2016
    Publication date: November 8, 2018
    Applicant: CHINA UNIONPAY CO., LTD.
    Inventors: Liang Feng, Zihao Cai, Yawei Yin