Patent ID: 6483606
Filing Date: 2002-11-19
Classification: H04N

Abstract:
A method of selecting colorants, from a plurality of colorants defining a color space, for a set of pixels, to obtain actual colors approximating desired colors for the respective pixels, the actual colors being output by an output apparatus, comprising the steps of, for each pixel:determining the desired color; performing undercolor removal for the desired color, thereby dividing the desired color into first and second components; performing a scalar error diffusion for the first component of the desired color, resulting in a first component of the actual color; performing a vector error diffusion for the second component of the desired color, the vector error diffusion using a reduced set of combinations achievable from the plurality of colorants, resulting in a second component of the actual color; combining the first and second components of the actual color to achieve the final actual color; and outputting the final actual color by the output apparatus.