Patents by Inventor Roy Goh

Roy Goh 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).

  • Video artifact suppression via rolling flicker detection
    Patent number: 8441549
    Abstract: A method for suppressing banding and rolling flicker in video acquired by a video camera. The method comprises acquiring a plurality of video frames and assessing an amount of rolling flicker in the plurality of video frames. The method further comprises configuring the video camera to quiet banding and rolling flicker responsive to periodic illumination at a first frequency if the amount of rolling flicker is above a threshold, and, configuring the video camera to quiet banding and rolling flicker responsive to periodic illumination at a second frequency if the amount of rolling flicker is below the threshold.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: May 14, 2013
    Assignee: Microsoft Corporation
    Inventors: Yi He, Stuart William Milton, Todd Nelson Schoepflin, Andrew Juenger, Roy Goh, Douglas L. Beck
  • Photographic flicker detection and compensation
    Patent number: 8330829
    Abstract: One disclosed embodiment includes detecting flicker in a photographic setting. A plurality of samples are obtained from a light detector circuit of a camera, each of which has a value that is dependent upon intensity of light incident upon the camera. The method further includes processing the samples to identify whether the incident light is varying in intensity at one or more pre-selected frequencies. The processing may include multiplying the samples with one or more periodic signals to generate scalar product outputs, and analyzing the scalar product outputs to ascertain the presence of periodic flicker.
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: December 11, 2012
    Assignee: Microsoft Corporation
    Inventors: Roy Goh, Andrew Juenger, Yi He, Stuart William Milton
  • VIDEO ARTIFACT SUPPRESSION VIA ROLLING FLICKER DETECTION
    Publication number: 20110187893
    Abstract: A method for suppressing banding and rolling flicker in video acquired by a video camera. The method comprises acquiring a plurality of video frames and assessing an amount of rolling flicker in the plurality of video frames. The method further comprises configuring the video camera to quiet banding and rolling flicker responsive to periodic illumination at a first frequency if the amount of rolling flicker is above a threshold, and, configuring the video camera to quiet banding and rolling flicker responsive to periodic illumination at a second frequency if the amount of rolling flicker is below the threshold.
    Type: Application
    Filed: June 28, 2010
    Publication date: August 4, 2011
    Applicant: MICROSOFT CORPORATION
    Inventors: Yi He, Stuart William Milton, Todd Nelson Schoepflin, Andrew Juenger, Roy Goh, Douglas L. Beck
  • PHOTOGRAPHIC FLICKER DETECTION AND COMPENSATION
    Publication number: 20110157415
    Abstract: One disclosed embodiment includes detecting flicker in a photographic setting. A plurality of samples are obtained from a light detector circuit of a camera, each of which has a value that is dependent upon intensity of light incident upon the camera. The method further includes processing the samples to identify whether the incident light is varying in intensity at one or more pre-selected frequencies. The processing may include multiplying the samples with one or more periodic signals to generate scalar product outputs, and analyzing the scalar product outputs to ascertain the presence of periodic flicker.
    Type: Application
    Filed: April 7, 2010
    Publication date: June 30, 2011
    Applicant: MICROSOFT CORPORATION
    Inventors: Roy Goh, Andrew Juenger, Yi He, Stuart William Milton