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. 26, 2005
Filed:
Apr. 23, 2004
Applicants:
Shinya Tokuda, Yokohama, JP;
Takashi Yamaguchi, Kawasaki, JP;
Inventors:
Shinya Tokuda, Yokohama, JP;
Takashi Yamaguchi, Kawasaki, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J011/44 ; G06K009/00 ;
U.S. Cl.
CPC ...
Abstract
Composite image information which is generated by embedding invisible sub-information in visible main image information and recorded on a recording medium is read. A spatial frequency component unique to key information used to restore the sub-information is extracted from the composite image information read from the recording medium. The sub-information is reconstructed from the extracted spatial frequency component.