Patent ID: 6312101
Filing Date: 2001-11-06
Classification: H04N

Abstract:
A method for reproducing digital images having at least one color channel containing pixels using a digital printer having a set of colorants, wherein two or more of the colorants of the set have substantially the same color but different densities, and printer code values for a particular color channel are used to control colorant amounts for said two or more colorants, comprising the steps of:a) forming a look-up table for each of the two or more colorants, wherein the look-up tables are formed by minimizing an objective function, said look-up table producing a colorant control signal as a function of the printer code values for the particular color channel and wherein each control signal individually corresponds to a colorant;b) addressing the look-up tables with the printer code values for each pixel of the digital image to determine the colorant control signal for each of the two or more colorants; andc) controlling the digital printer using the colorant control signal to control the colorant amount for each of the two or more colorants in the process of reproducing the digital image.