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:
Jun. 09, 2015
Filed:
Dec. 13, 2010
Nobutaka Miyake, Yokohama, JP;
Ryosuke Iguchi, Kawasaki, JP;
Tohru Ikeda, Yokohama, JP;
Akitoshi Yamada, Yokohama, JP;
Mitsuhiro Ono, Tokyo, JP;
Fumitaka Goto, Tokyo, JP;
Hidetsugu Kagawa, Kawasaki, JP;
Tomokazu Ishikawa, Kawasaki, JP;
Junichi Nakagawa, Tokyo, JP;
Senichi Saito, Kawasaki, JP;
Nobutaka Miyake, Yokohama, JP;
Ryosuke Iguchi, Kawasaki, JP;
Tohru Ikeda, Yokohama, JP;
Akitoshi Yamada, Yokohama, JP;
Mitsuhiro Ono, Tokyo, JP;
Fumitaka Goto, Tokyo, JP;
Hidetsugu Kagawa, Kawasaki, JP;
Tomokazu Ishikawa, Kawasaki, JP;
Junichi Nakagawa, Tokyo, JP;
Senichi Saito, Kawasaki, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Provided is an image processing apparatus that can accurately and efficiently reduce color unevenness that occurs in a color image, which is formed by color mixture of a plurality of different types of inks, due to a variation in ejection characteristic among nozzles. The inks are respectively ejected from the nozzle arrays to print patches; regions where color correction for test color images should be performed are specified; a different types of color correction processing for color signals corresponding to the color correction regions are performed to print color correction patches; a color correction patch to be used is selected; on the basis of selected color correction processing, a table parameter corresponding to a nozzle is formed; when the plurality of color correction patches are formed, only correction candidate values having larger color differences than a predetermined threshold value in a uniform color space are generated for color signals.