Patent ID: 6867883

Claim:
A method, comprising: converting a first gamut in a CMY color space to a first gamut in a CMYK color space; converting the first gamut in CMYK color space to a gamut in a color space having a lightness component; resealing a lightness component of a gamut value in the color space having a lightness component to form a modified gamut; and converting the modified gamut to a second gamut in a CMYK color space; wherein said rescaling a lightness component of a gamut value in the color space having a lightness component to form a modified gamut comprises: modifying the gamut in the color space having a lightness component by changing a lightness component of a color value in the color space having a lightness component such that an upper surface of the first gamut in the CMY color space is preserved and a lower surface of the first gamut in the CMY color space is mapped to a bottom surface of the gamut of a full CMYK color space to form an expanded gamut in the color space having a lightness component.