The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 10, 2007
Filed:
Aug. 07, 2001
Applicants:
Gabriel Fielding, Rochester, NY (US);
Paul W. Jones, Rochester, NY (US);
Inventors:
Gabriel Fielding, Rochester, NY (US);
Paul W. Jones, Rochester, NY (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for extracting a watermark signal contained in a watermarked digital image sequence having two or more frames, including the steps of estimating correspondences between one or more pairs of frames in the watermarked digital image sequence; computing a displaced frame difference for one or more frames in the watermarked digital image sequence using the correspondences; and extracting the watermark signal from one or more displaced frame differences.