Patent ID: 7495800

Claim:
One or more computer-readable mediums comprising digital data representing coordinates of a color S in a first coordinate system, wherein the color S has tristimulus values T 1 , T 2 , and T 3 in a second coordinate system, wherein the coordinates in the first coordinate system comprise coordinates S 1 , S 2 , S 3 , or are a linear transformation of the coordinates S 1 , S 2 , S 3 , wherein: (A) the coordinate S 1 is defined by a value B = g 11 ⁢ T 1 2 + g 22 ⁢ T 2 2 + g 33 ⁢ T 3 2 + g 12 ⁢ T 1 ⁢ T 2 + g 13 ⁢ T 1 ⁢ T 3 + g 23 ⁢ T 2 ⁢ T 3 wherein g 11 , g 22 , g 33 , g 12 , g 13 , g 23 are predefined constants, and g 11 , g 22 , g 33 are not equal to zero, or (B) the coordinate S 1 is defined by the value B and by a sign of a predefined function of one or more of T 1 , T 2 , T 3 .