Patent ID: 7012714
Filing Date: 2006-03-14
Classification: H04N

Abstract:
1. A color processing method used for transforming an arbitrary input color signal in an input color space to a four-color signal including a black component, the method comprising the steps of: generating a first set of plural optimal K corresponding to plural representative color signals of the input color signal that belong to a partial color space reproducible with three colors and a second set of plural optimal K corresponding to plural representative color signals of the input color signal that belong to a curved plane being reproducible with four colors including black and satisfying a coverage restriction; predicting an optimal K corresponding to the input color signal in the input color space based on a model generated from plural pairs of the representative color signals in the input color space and the first or second set of plural optimal K; and predicting amounts of three colors except black from the predicted optimal K and the input color signal to calculate the four-color signal including the black component, wherein K is an amount of the black component.