Patent ID: 8238004

Claim:
A color signal processing apparatus comprising: a total amount calculating unit that calculates a total amount value of an input color signal in an output device color space which has, as color components, coloring materials used in an output device; a limit value calculating unit that calculates a limit value for limiting the total amount of the input color signal, in accordance with the calculated total amount value; a correcting unit that corrects the input color signal in the output device color space so that the total amount value of the input color signal becomes the calculated limit value or less, wherein the input color signal is one of second color signals in a color conversion table in which first color signals in an input color space are correlated in advance with the second color signals in the output device color space; and a color conversion table correcting unit that corrects the color conversion table by replacing the one of the second color signals in the color conversion table with the corrected input color signal for subsequent conversion of input color signals using the corrected color conversion table, wherein when the output device color space is a device-independent color space, the color components of the output device color space include black, and if the total amount value of the input color signal exceeds the limit value calculated by the limit value calculating unit, the correcting unit corrects the input color signal by decreasing the respective color components of the input color signal at an equal rate so that the total amount value of the input color signals becomes less than the calculated limit value.