Patents by Inventor Tom Henning

Tom Henning 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).

  • Segmenting image data into blocks and deleting some prior to compression
    Patent number: 6272252
    Abstract: A method of improving the compression ratio of image data in the form of foreground data printed over background data by arranging both kinds of data pixels into 8 by 8 pixel blocks. All blocks that do not contain at least one pixel to be printed are deleted before compression. The deleted blocks will be entirely background pixels that will be overlaid by foreground pixels, or entirely foreground pixels that will not be printed because they are located outside of foreground masks.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: August 7, 2001
    Assignee: Xerox Corporation
    Inventors: George L. Eldridge, Farzin Blurfrushan, Tom Henning, San A. Phong, Li-Fung Cheung