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1. (WO2001037210) COMPOSITE COLOR TRANSFORMATION USING CUSTOMIZED GAMUT MAPPINGS

Pub. No.:    WO/2001/037210    International Application No.:    PCT/US2000/031225
Publication Date: Sat May 26 01:59:59 CEST 2001 International Filing Date: Thu Nov 16 00:59:59 CET 2000
IPC: G06T 11/00
Applicants: CANON KABUSHIKI KAISHA
HAIKIN, John, S.
NEWMAN, Todd, D.
Inventors: HAIKIN, John, S.
NEWMAN, Todd, D.
Title: COMPOSITE COLOR TRANSFORMATION USING CUSTOMIZED GAMUT MAPPINGS
Abstract:
A color management system that transforms input image data (224) from an input colorant space to an output colorant space (225) using input and output device appearance transforms and a customizable gamut mapping algorithm (227). The gamut mapping algorithm is customizable based on the color management session in question, and in particular may be customizable based on the content of the image data, based on a comparison between input device appearance transforms and output device appearance transforms, or based on viewing conditions, output conditions or print media involved. According to the invention, the customizable gamut mapping algorithm is customized based on the current color management session, and the customized gamut mapping algorithm is composited with the input device appearance transform and/or the output device appearance transform thereby yielding one or more transformations that can be applied to the input image data more efficiently than if the transformations (including the gamut mapping algorithm) were applied individually.