Patent ID: 7589866

Claim:
A circuitry-implemented method comprising image editing, the method comprising: (1) obtaining digital data for image portions p 1 ,p 2 , . . . , wherein for each image portion p (p=p 1 , p 2 , . . . ), the digital data represent coordinates of a color S(p) of the portion p in a first coordinate system, wherein for a color S having tristimulus values T 1 , T 2 , T 3 in a second coordinate system, the coordinates of the color S in the first coordinate system comprise coordinates S 1 , S 2 , S 3 , or a linear transformation of the coordinates S 1 , S 2 , S 3 , wherein: (A) the coordinate S 1 is defined by a B value B= √{square root over (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 B value and by a sign of a predefined function of one or more of T 1 , T 2 , T 3 ; (2) for each image portion p (p=p 1 , p 2 , . . . ), obtaining color coordinates in the first color coordinate system of a modified color S*(p) whose coordinates S 2 , S 3 are predefined constant values independent of the portion p.