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. 30, 1997
Filed:
Oct. 30, 1995
Applicant:
Inventors:
Ken-ichi Ohta, Kawasaki, JP;
Akihiro Usami, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
382167 ; 358518 ;
Abstract
A color-image processing method and apparatus for transforming color-separated RGB image signals into CMY color signals, extracting a minimum-value signal K based upon each of the CMY signals, subjecting each of the CMY signals and the minimum-value signal K to matrix transformation in accordance with prescribed transformation coefficients and outputting the transformed signals, whereby the RGB image signals can be transformed into CMYK color signals efficiently without sacrificing color reproducibility.