Patents by Inventor William Yeoh

William Yeoh 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: 8174710
    Abstract: Disclosed herein is a system and method for diagnosing a failure condition of an image processing apparatus. When a failure condition is detected in an image path during output of a document, a fault code is issued. The image processing apparatus is then capable of performing an internal diagnosis to generate a diagnostic report, and send the diagnostic report and fault code to an operator at a remote location. The system and method allows one to diagnose a problem or failure condition more quickly and efficiently, thereby cutting down on service time and costs.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: May 8, 2012
    Assignee: Xerox Corporation
    Inventors: Ramesh Nagarajan, Clara Cuciurean-Zapan, William Yeoh
  • Patent number: 7805021
    Abstract: A method to detect edges based on chrominance information alone or in combination with gray level values includes comparing chrominance values to a registration parameter based on chromacity measurements of a backing. To calibrate a system, a small scan obtains sample image data for the backing in the document feeder. Using the sampled image data, average chrominance values for the backing are determined. Based on the averages, a channel having a low chrominance contribution is selected as the registration channel. A registration parameter is calculated for automatic registration of documents based on the average chrominance and chrominance deviation for the registration channel.
    Type: Grant
    Filed: July 8, 2003
    Date of Patent: September 28, 2010
    Assignee: Xerox Corporation
    Inventors: William Yeoh, Ramesh Nagarajan, James M. Maryniak
  • Publication number: 20100110468
    Abstract: Disclosed herein is a system and method for diagnosing a failure condition of an image processing apparatus. When a failure condition is detected in an image path during output of a document, a fault code is issued. The image processing apparatus is then capable of performing an internal diagnosis to generate a diagnostic report, and send the diagnostic report and fault code to an operator at a remote location. The system and method allows one to diagnose a problem or failure condition more quickly and efficiently, thereby cutting down on service time and costs.
    Type: Application
    Filed: November 3, 2008
    Publication date: May 6, 2010
    Applicant: XEROX CORPORATION
    Inventors: Ramesh Nagarajan, Clara Cuciurean-Zapan, William Yeoh
  • Publication number: 20040114147
    Abstract: A method to detect edges based on chrominance information alone or in combination with gray level values includes comparing chrominance values to a registration parameter based on chromacity measurements of a backing. To calibrate a system, a small scan obtains sample image data for the backing in the document feeder. Using the sampled image data, average chrominance values for the backing are determined. Based on the averages, a channel having a low chrominance contribution is selected as the registration channel. A registration parameter is calculated for automatic registration of documents based on the average chrominance and chrominance deviation for the registration channel.
    Type: Application
    Filed: July 8, 2003
    Publication date: June 17, 2004
    Applicant: Xerox Corporation
    Inventors: William Yeoh, Ramesh Nagarajan, James M. Maryniak