Patents by Inventor Fei-Xing Yu

Fei-Xing Yu 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).

  • Automatic recognition of scale marks on level ruler
    Patent number: 8483441
    Abstract: Image recognition and distance calculation methods and devices are provided. First, an image corresponding to a level ruler is obtained, wherein the image includes a first predefined scale and a second predefined scale projected on the level ruler. Then, a baseline height of a baseline mark in the level ruler is determined according to the image. The heights of the first predefined scale and the second predefined scale are calculated according to the baseline height of the baseline mark, the position of the baseline mark in the image, and the positions of the first predefined scale and the second predefined scale in the image. Thereafter, a distance to the level ruler is calculated according to a height difference between the heights of the first predefined scale and the second predefined scale.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: July 9, 2013
    Assignee: Asia Optical International Ltd.
    Inventors: Fei-Xing Yu, Xiang-Zhe Kang
  • IMAGE RECOGNITION AND DISTANCE CALCULATION METHODS AND DEVICES
    Publication number: 20100034467
    Abstract: Image recognition and distance calculation methods and devices are provided. First, an image corresponding to a level ruler is obtained, wherein the image includes a first predefined scale and a second predefined scale projected on the level ruler. Then, a baseline height of a baseline mark in the level ruler is determined according to the image. The heights of the first predefined scale and the second predefined scale are calculated according to the baseline height of the baseline mark, the position of the baseline mark in the image, and the positions of the first predefined scale and the second predefined scale in the image. Thereafter, a distance to the level ruler is calculated according to a height difference between the heights of the first predefined scale and the second predefined scale.
    Type: Application
    Filed: December 11, 2008
    Publication date: February 11, 2010
    Applicant: ASIA OPTICAL CO., INC.
    Inventors: Fei-Xing Yu, Xiang-Zhe Kang