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:
Sep. 14, 2010
Filed:
Jun. 06, 2007
Applicants:
Hiroaki Nashizawa, Tokyo, JP;
Hayato Kubo, Chiba, JP;
Naoto Ueno, Tokyo, JP;
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 15/00 (2006.01); H04N 1/60 (2006.01); G06K 15/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In generating a conversion characteristic look-up table between an output device dependence color space and device independence color space, when white and black correction is performed for a colorimetric value of a sample chart output from an output device, the values of the chromaticity components of the white point of the colorimetric value are maintained even after the correction. In addition, the conversion characteristic look-up table is generated such that only a corrected white point is corrected to a reference white point so as to make the reference white point smoothly continue to other grid points.