Patent ID: 6101272
Filing Date: 2000-08-08
Classification: H04N

Abstract:
A color transformation method, in which input image data from an image input device, represented by three signals that are mutually independent and provide a color of gray when values of the three signals coincide, are subjected to a color transformation to produce output image data for production of an image by an image output device, the output image data being represented by three color transformed signals, which method comprises the steps of:determining, for each pixel:a lightness component specified between a maximum value and a minimum value for said three signals, andthree chromaticity components obtained by subtracting said lightness component from said three signals respectively;modifying the three chromaticity components in accordance with said three signals, said modifying being one of amplifying and attenuating; andadding the chromaticity components to said lightness component modified in accordance with said three signals to produce said output image data.