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. 08, 2008
Filed:
Sep. 04, 2003
Kenichi Noridomi, Fukuoka, JP;
Hisashi Inoue, Fukuoka, JP;
Takashi Katsura, Fukuoka, JP;
Masataka Ejima, Iizuka, JP;
Kenichi Noridomi, Fukuoka, JP;
Hisashi Inoue, Fukuoka, JP;
Takashi Katsura, Fukuoka, JP;
Masataka Ejima, Iizuka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A digital image signal is divided into blocks. Each of the divided blocks is subjected to orthogonal transformation. As a result, the divided blocks are transformed into several frequency components. One or more frequency components are selected in accordance with a characteristic amount that is extracted from the several frequency components. Values of the selected frequency components are operated under a predetermined rule in accordance with an embedment signal that is generated from embedment information.