Patents by Inventor Cornelis Wilhelmus Antonius Marie Van Overveld

Cornelis Wilhelmus Antonius Marie Van Overveld 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 computing a computer graphics image of a textured surface
    Patent number: 6614446
    Abstract: A pixel value for a pixel is computed in a texture mapped computer graphics image. Surface coordinates are computed that map to a location of intersection of a 3D surface with a line of sight from the pixel. A surface coordinate offset vector is computed that represents a change in the surface coordinates of the intersection, the change corresponding to displacement of the surface by an amount specified by a displacement map value for the surface coordinates. The pixel value is computed in the computer graphics image from a texture value defined for said surface coordinates offset by said offset vector.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: September 2, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Cornelis Wilhelmus Antonius Marie Van Overveld
  • Embedding and detecting a watermark in an information signal
    Publication number: 20010032315
    Abstract: A known method of watermarking an information signal is based on extraction of salient points (21) of the signal (e.g. zero crossings in audio, edges of an image) and “warping” (24) said salient points towards a given watermark pattern (W). One step in the embedding and detection process is determining (22) whether or not salient points lie “on” or “off” the watermark. This is a hard decision.
    Type: Application
    Filed: February 27, 2001
    Publication date: October 18, 2001
    Inventors: Cornelis Wilhelmus Antonius Marie Van Overveld, Peter Maria Johannes Rongen, Arnold Houwing