Patents Represented by Attorney, Agent or Law Firm Oppenheimer Wolff & Donnell LLP
  • Selective filtering of a dithered image for the purpose of inverse dithering
    Patent number: 6222945
    Abstract: A method for selecting a filter from among a plurality of ordered filters within an inverse dithering system is disclosed. In response to receipt of a number of filter parameters associated with the plurality of ordered filters and a selected portion of a dithered image, a determination is made of the region of support for the plurality of filters from the filter parameters. From these regions of support, a lowest ordered filter having a region of support that excludes an image edge in the selected portion of the dithered image is selected.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: April 24, 2001
    Assignee: Compaq Computer Corporation
    Inventors: Shiufun Cheung, Robert A. Ulichney, Robert MacNamara, Giridharan Iyengar