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:
Aug. 31, 2010
Filed:
Sep. 21, 2007
Kazuo Ohzeki, Tokyo, JP;
Kazuo Ohzeki, Tokyo, JP;
Shibaura Institute of Technology, Tokyo, JP;
Abstract
An electronic watermark embedding apparatus includes means for storing a pixel matrix G with n rows and m columns of an input image, means for acquiring singular values sto s, left singular vectors uto uand right singular vectors vto vof the pixel matrix G, means for creating a watermark information matrix W with r rows and r columns having a non-0 value as at least one nondiagonal element as electronic watermark information, creating a diagonal matrix S having singular values sto sas diagonal elements, and creating a matrix Son the basis of S=S+aW (a≠0). The apparatus also includes means for multiplying the matrix Sby a matrix U having the acquired left singular vectors uto uas columns from the left and multiplying the transposed matrix of a matrix V having the acquired right singular vectors vto vas columns from the right to create a pixel matrix Gwith n rows and m columns, and outputting it as an electronic-watermark-embedded image of the input image.