Accelerating color conversion using a temporary palette cache

Details Accelerating color conversion using a temporary palette cache Accelerating color conversion using a temporary palette cache

2001-11-30

2008-10-28

Coles, Edward L. (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003010

Reexamination Certificate

active

07443544

ABSTRACT:
A method and device for accelerating a color conversion process that converts input image data corresponding to a first color space to output image data corresponding to an output color space. A temporary cache stores color information in an array, and performs a conversion calculation for each individual color combination. If a pixel corresponds to a new color combination, the pixel information is stored in a new index of the array. If the pixel repeats a previously processed color, the pixel information is stored in the same index of the array as the previously processed pixel. A color conversion calculation is performed after all pixels within a block of pixels are mapped to the temporary array.

REFERENCES:
patent: 5502458 (1996-03-01), Braudaway et al.
patent: 5579031 (1996-11-01), Liang
patent: 5668890 (1997-09-01), Winkelman
patent: 6522783 (2003-02-01), Zeng et al.

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