Patent ID: 7859722

Claim:
A method comprising: identifying a lookup table used to convert a color value comprising a plurality of color component values from a first color space to a second color space, the lookup table comprising a first plurality of color values associated with the first color space and a second plurality of color values associated with the second color space, each of the first plurality of color values having a corresponding color value in the second plurality of color values; identifying a pure gray color value from the first plurality of color values, the pure gray color value having a corresponding non-pure gray color value in the second plurality of color values; determining a corresponding pure gray color value in the second color space that is substantially equivalent to the pure gray color value from the first plurality of color values; modifying the lookup table by replacing the corresponding non-pure gray color value in the second plurality of color values with the corresponding pure gray color value in the second color space; identifying one or more near gray color values from the second plurality of color values, the one or more near gray color values being located in relatively close proximity in the lookup table to the corresponding pure gray color value in the second color space; and modifying the lookup table by replacing the one or more near gray color values using a smoothing function.