Patent ID: 9584700
Date: 2017-02-28
CPC Classifications: H04N

Claim:
1. A method of setting up a color separation table for a specific print system, the method comprising: finding first NPacs (Neugebauer Primary Area Coverages) of a specific print system that correspond to color values, at least one of the NPacs including contributions from plural NPs (Neugebauer Primaries), wherein the finding of first NPacs includes obtaining second NP area coverages by converting halftone data from at least one pre-determined pair of halftone data and corresponding color value to NPacs, the halftone data including halftone patterns associated with colors; generating, by a computer, a color separation table arranged as input for a halftone process that includes color values linked to the corresponding at least some of the first and at least some of the second NPacs; including the second NPacs with the first NPacs to constitute base NPacs; selecting the base NPacs that are closest to the reference print attribute value for a corresponding color value; optimizing NPacs by computing linear combinations of the base NPacs, wherein the computing of linear combinations of the base NPacs includes, assigning one of the base NPacs or the linear combination of base NPacs to a corresponding color value, depending on which is closest to the reference print attribute value.