Patents by Inventor Maxwell T. Sanford, II

Maxwell T. Sanford, II 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).

  • Data embedding employing degenerate clusters of data having differences less than noise value
    Patent number: 5819289
    Abstract: A method of embedding auxiliary information into a set of host data, such as a photograph, television signal, facsimile transmission, or identification card. All such host data contain intrinsic noise, allowing pixels in the host data which are nearly identical and which have values differing by less than the noise value to be manipulated and replaced with auxiliary data. As the embedding method does not change the elemental values of the host data, the auxiliary data do not noticeably affect the appearance or interpretation of the host data. By a substantially reverse process, the embedded auxiliary data can be retrieved easily by an authorized user.
    Type: Grant
    Filed: May 13, 1997
    Date of Patent: October 6, 1998
    Assignee: The Regents of the University of California
    Inventors: Maxwell T. Sanford, II, Theodore G. Handel