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. 31, 1991
Filed:
Jul. 30, 1990
Yoshinori Ikeda, Hira, JP;
Tadashi Yoshida, Ichikawa, JP;
Kimiyoshi Hayashi, Tokyo, JP;
Shunichi Abe, Kawasaki, JP;
Nobuo Matsuoka, Kawasaki, JP;
Mitsuo Akiyama, Murayama, JP;
Yoshinobu Mita, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A color image reading apparatus having a color sensor with plural sensor groups, the color sensor for separating an objective image into plural color components and for converting the plural color components into plural color component signals, and a shading corrector for performing shading correction for the plural color component signals. The shading corrector causes the plural sensor groups to substantially simultaneously read a reference plate and automatically corrects a shading correction state for each of the plural color component signals in accordance with data obtained from the plural sensor groups.