Patent ID: 9256816
Filing Date: 2016-02-09
CPC Classification: G06K,H04N

Claim Text:
1. A color converting device for converting a first color value acquired from printing data to a second color value, the color converting device comprising: a storage unit for storing the color values; and a color value converting section that converts the first color value to the second color value using a first color conversion table in which achromatic colors are set as monochromatic colors when the first color value satisfies a preset condition, and that converts the first color value to the second color value using a second color conversion table in which the achromatic colors are set as mixed colors of a plurality of colors when the first color value does not satisfy the preset condition, wherein the first color value is a color value in an RGB color space and the second color value is a color value in a CMYK color space, in the first color conversion table, a conversion value for converting to the CMYK color space is stored for each of a plurality of lattice points set at first intervals in the RGB color space, and for each of the lattice points that corresponds to an achromatic color, the conversion value stored for the lattice point is for conversion to a K-monochromatic color, and in the second color conversion table, a conversion value to the CYMK color space is stored for each of a plurality of lattice points set at second intervals, finer than the first intervals, in a plurality of hue planes partitioning the RGB color space at preset intervals, and for each of the lattice points that corresponds to an achromatic color, the conversion value stored for the lattice point is for conversion to a mixed CMYK color.