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:
Sep. 09, 2003
Filed:
Jun. 02, 2000
Apparatus and method for embedding information in an image through requantization step width control
Applicant:
Inventor:
Tomoyuki Miyashita, Kodaira, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K 9/00 ;
U.S. Cl.
CPC ...
G06K 9/00 ;
Abstract
When information is embedded in image data by requantization, there is a trade-off relationship between a decline in image quality and resistance of the embedded information. Accordingly, the image characteristics in the vicinity of a pixel of interest in which information is to be embedded are determined and, on the basis of the result of determination, the requantization step width which prevails when the information is embedded in the pixel of interest is controlled.
Miyashita, Tomoyuki. (2003). Apparatus and method for embedding information in an image through requantization step width control (U.S. Patent No. 6618489). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6618489
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