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:
Feb. 01, 2011
Filed:
Dec. 14, 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 n columns of an input image, means for acquiring eigenvalues sto sand eigenvectors pto pof the pixel matrix G, means for selecting at least one pair of eigenvalues (s,s) having different values from the eigenvalues sto sand correcting the eigenvalues sto ssuch that the values of the selected pair can be equal, means for creating a Jordan-normal-form matrix Shaving the corrected eigenvalues as diagonal elements and 1 as one of the nondiagonal elements corresponding to the selected pair, means for outputting the eigenvectors pto pas electronic watermark key information, means for performing the inverse transform of diagonalization computing on the created matrix Sby using the eigenvectors pto pto create a pixel matrix Gwith n rows and n columns thereby and outputting it as an electronic-watermark-embedded image of the input image.