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:
Aug. 20, 2002
Filed:
Jul. 06, 1998
Applicant:
Inventors:
Akihiro Usami, Yokohama, JP;
Yoshinori Ito, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K 9/40 ;
U.S. Cl.
CPC ...
G06K 9/40 ;
Abstract
Two or more original illumination units are mounted on an image reading apparatus. In reading a patched original, an image read while being illuminated along one direction is compared with an image read while being illuminated along another direction or along two directions including the one direction and another direction. In accordance with an image data difference between the two images, image processing or illumination light amount changing is performed to erase shades to be caused by a patched portion of the original.