Color signal conversion method and apparatus, and method and...

Details Color signal conversion method and apparatus, and method and... Color signal conversion method and apparatus, and method and...

2011-07-19

2011-07-19

Williams, Kimberly A (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S518000, C358S520000, C345S604000

Reexamination Certificate

active

07982912

ABSTRACT:
A color signal conversion apparatus for converting a color signal of an input gamut to a color signal of an output gamut is provided. First, a target gamut for gamut mapping carried out on the input gamut is set, after which an evaluation function is determined for evaluating the difference between the target gamut and the results of gamut mapping performed on the input gamut using initialized mapping parameters. Then, the mapping parameters are determined based on the evaluation function so that the difference is minimum. The color signal of the input gamut is then mapped to the output gamut based on the determined mapping parameters and constraining conditions. This makes it possible to achieve favorable gamut mapping based on optimal mapping parameters that have been determined automatically.

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