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:
Dec. 25, 2012
Filed:
Nov. 23, 2009
Junichi Hayashi, Kamakura, JP;
Yoshiharu Imamoto, Tokyo, JP;
Nobuhiro Tagashira, Nagareyama, JP;
Kazuya Kishi, Yokohama, JP;
Yasuhiro Nakamoto, Kawasaki, JP;
Kazuomi Oishi, Yokohama, JP;
Junichi Hayashi, Kamakura, JP;
Yoshiharu Imamoto, Tokyo, JP;
Nobuhiro Tagashira, Nagareyama, JP;
Kazuya Kishi, Yokohama, JP;
Yasuhiro Nakamoto, Kawasaki, JP;
Kazuomi Oishi, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
This invention provides a technique of preventing determination of image alteration when digital image data has undergone, e.g., rotation without any substantial change in contents. To do this, an area separation processing unit separates image data into areas. For each of the separated areas, an area feature value calculator calculates an area feature value independent of the coordinate information of the image. An area order sorter sorts the separated areas in accordance with the calculated area feature values. A validation data generation processing unit generates validation data based on the sort result.