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, 2013
Filed:
Feb. 09, 2012
Mayuko Kishino, Tokyo, JP;
Shinichi Miyazaki, Kawasaki, JP;
Toshiki Miyazaki, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
With an apparatus according to the present invention, when an input color gamut is compressed to an output color gamut, based on the difference value between the lightness of paper white and the lightness at the maximum chroma in the output color gamut of a predetermined hue, if the lightness difference is below a predetermined threshold value, a compression convergence point is set at a position at which lightness is lower than or equal to the lightness at the maximum chroma in the output color gamut. This suppresses reduction of the gradation in the direction of input chroma, and makes it possible to compress the input color gamut to the output color gamut such that excellent color reproduction is achieved while the gradations of lightness and chroma in the input color space are maintained.