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Data embedding employing degenerate clusters of data having differences less than noise value

United States Patent

October 6, 1998
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
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.
Sanford, II; Maxwell T. (Los Almos, NM), Handel; Theodore G. (Los Almos, NM)
The Regents of the University of California (Los Almos, NM)
08/ 855,243
May 13, 1997
The present invention generally relates to digital manipulation of numerical data and, more specifically, to the embedding of external data into existing data fields. This invention was made with Government support under Contract No. W-7405-ENG-36 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.