Patents by Inventor James Charles Dalrymple

James Charles Dalrymple 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 background adjustment in color reproduction devices
    Publication number: 20020159080
    Abstract: A method for background adjustment. A background lightness level in an original image is estimated. Pixels are then converted to a luminance-chrominance color space. Pixels have lightness levels equal to the background lightness level are mapped to a value corresponding to white as background pixels. Chroma values for the background pixels are compared to a threshold ad adjusted as needed, either by adjusting the lightness value or by removing the chrominance values. The luminance-chrominance data is then converted to output space.
    Type: Application
    Filed: March 14, 2001
    Publication date: October 31, 2002
    Applicant: Sharp Laboratories of America, Inc.
    Inventors: Xiao-Fan Feng, Jon Matthew Speigle, James Charles Dalrymple, James Zhixin Chang