Method and apparatus of color conversion

Details Method and apparatus of color conversion Method and apparatus of color conversion

2007-03-27

2010-10-12

Baker, Charlotte M (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S518000, C358S520000, C345S600000, C382S162000, C382S165000, C382S167000, C348S630000, C348S645000, C348S649000, C348S703000

Reexamination Certificate

active

07813003

ABSTRACT:
A method and an apparatus of color-space conversion are provided herein. When adjustment of saturation and/or hue is performed on a RGB color signal, pixel luminance will be influenced to some extent. In the conversion method of the present invention, luminance compensation will be performed after global or local adjustment to keep the pixel luminance from being influenced by the color-space conversion. The luminance compensation method is to adjust a compensation value according to a ratio of an adjusted pixel luminance to an original pixel luminance.

REFERENCES:
patent: 6434266 (2002-08-01), Kanno et al.
patent: 6445816 (2002-09-01), Pettigrew
patent: 6507372 (2003-01-01), Kim
patent: 7450183 (2008-11-01), Lee et al.
patent: 2007/0285434 (2007-12-01), Lin et al.

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