Method and apparatus with reduced look-up tables for converting

Details Method and apparatus with reduced look-up tables for converting Method and apparatus with reduced look-up tables for converting

1997-11-04

2000-04-11

Nguyen, Madeleine

Facsimile and static presentation processing

Natural color facsimile

Color correction

358523, G03F 308

Patent

active

060493992

ABSTRACT:
In a method and apparatus for reducing the number of look-up tables when converting digitized luminance-chrominance color space signals to digitized RGB color space signals, first, second, third and fourth matrix multiplication operations of the digitized chrominance color space signals are performed. The first matrix multiplication operation has a first result to be used in conversion for the digitized R color space signal. The second and third matrix multiplication operations have second and third results to be used in conversion for the digitized G color space signal. The fourth matrix multiplication operation has a fourth result to be used in conversion for the B color space signal. One of the first and fourth matrix multiplication operations, and one of the second and third matrix multiplication operations are associated with the same one of the digitized chrominance color space signals and are jointly implemented in a single look-up table unit.

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