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:
Jan. 20, 2015
Filed:
Dec. 09, 2010
Hidetsugu Kagawa, Kawasaki, JP;
Nobutaka Miyake, Yokohama, JP;
Tohru Ikeda, Yokohama, JP;
Akitoshi Yamada, Yokohama, JP;
Mitsuhiro Ono, Tokyo, JP;
Fumitaka Goto, Tokyo, JP;
Ryosuke Iguchi, Kawasaki, JP;
Tomokazu Ishikawa, Kawasaki, JP;
Junichi Nakagawa, Tokyo, JP;
Senichi Saito, Kawasaki, JP;
Hidetsugu Kagawa, Kawasaki, JP;
Nobutaka Miyake, Yokohama, JP;
Tohru Ikeda, Yokohama, JP;
Akitoshi Yamada, Yokohama, JP;
Mitsuhiro Ono, Tokyo, JP;
Fumitaka Goto, Tokyo, JP;
Ryosuke Iguchi, Kawasaki, JP;
Tomokazu Ishikawa, Kawasaki, JP;
Junichi Nakagawa, Tokyo, JP;
Senichi Saito, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In the present invention, a first calculation unit calculates, based on image data obtained by reading with a reading unit a plurality of patches formed on a printing medium by a plurality of nozzle regions constituting nozzle array of a printing head, respective color specification values of a plurality of correction regions corresponding to a plurality of nozzle regions constituting the nozzle array. Then, a target value setting unit sets, based on the calculated color specification values of the plurality of correction regions, a target color specification value of the patch. Further, a second calculation unit calculates a difference between each of the color specification values of the plurality of correction regions and the target color specification value as a correction amount. After that, based on the correction amount calculated, image data corresponding to an image printed by each of the plurality of nozzle regions are corrected.