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:
Jul. 16, 2002
Filed:
Dec. 08, 1995
Applicant:
Inventor:
Jonathan Y. Hui, Fremont, CA (US);
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/500 ; G03F 3/08 ; H04N 1/46 ; G06K 9/32 ;
U.S. Cl.
CPC ...
G06F 1/500 ; G03F 3/08 ; H04N 1/46 ; G06K 9/32 ;
Abstract
A method for converting color coordinate values of a target color from a first three-dimensional color space to a second three-dimensional color space, includes looking up the target color in a look-up table and interpolating each color component of the target color only in a single dimension between adjacent grid points in the look-up table. Preferably, each color component value shares a common grid point upon which interpolation is based for all color component values, with the common grid point lying on the neutral gray axis when a cube enclosing the target color includes the neutral gray axis of the first three-dimensional color space.