Patents by Inventor Donna M. Charissis

Donna M. Charissis 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 accurately rendering half-bitted image pixels
    Patent number: 5539866
    Abstract: A method and apparatus for identifying regions within a first binary image where half-bitting may be present, converting those regions to a multiple-bit/pixel representation so as to accurately represent the image density and the intended edge structure for the region, and further generating an enhanced resolution representation of the region in either a second binary image, wherein the second binary image has a spatial resolution greater than the first image, or a multiple-bit per pixel (gray) image at the same resolution as the input image so as to enable an improved rendering of the first binary image.
    Type: Grant
    Filed: May 11, 1994
    Date of Patent: July 23, 1996
    Assignee: Xerox Corporation
    Inventors: Martin E. Banton, Donna M. Charissis