Colour separation method

Abstract

Separation of a color into values for colorants in colorant space can be done easily when color correction and color separation are done in a separate step. To perform color separation the color can be defined as a set of values in a trajectory space wherein trajectories are defined comprising points for which ink behavior during color separation is known. Colorant values for the color can be determined using simple interpolation techniques based upon values of the color located in trajectory space, known values and corresponding colorant values of the trajectory points. Trajectories are preferably color axes dividing the trajectory space into tetrahedra. Obtained colorant values may be further corrected using techniques such as colorant replacement or colorant splitting. A color correction step can be done previous to the color separation step. The combined process can be calibrated using a test target.

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