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:
May. 25, 2010
Filed:
Aug. 18, 2006
Taichi Isogai, Tokyo, JP;
Taichi Isogai, Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A digital watermark detection apparatus detects a watermark value from a motion image in which a topological invariant is embedded as the watermark value. The digital watermark detection apparatus includes a watermark component extracting unit which extracts each watermark component from the motion image; an average value computing unit which computes an average value of component values of pixels included in the watermark component; an identified watermark component determination unit which determines whether or not the watermark component is an identified watermark component to be utilized in identifying an arrangement unit of a plurality of watermark components based on the average value; a watermark component identifying unit which identifies the watermark component except for the identified watermark component; and a watermark value computing unit which computes the watermark value based on the identified watermark component and the watermark components except for the identified watermark component.