Patents Examined by Von J. Cruso
  • Data encoding using frail watermarks
    Patent number: 7054463
    Abstract: Image, video, or audio data is encoded with both a frail and a robust watermark. The two watermarks respond differently to different forms of processing (e.g., copying the object may render the frail watermark unreadable), permitting an original object to be distinguished from a processed object. Appropriate action can then taken in response thereto.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: May 30, 2006
    Assignee: Digimarc Corporation
    Inventors: Geoffrey B. Rhoads, Ammon E. Gustafson