Patent ID: 9674399
Date: 2017-06-06
CPC Classifications: G06K,H04N

Claim:
1. A method for printing an image with a printer that uses three inks defining a three-dimensional ink-space and for which is available a set of three-dimensional color measurements {p i }(i=1, . . . , M) of color patches with three-ink combinations in the three-dimensional ink-space of the printer, the method comprising the steps of: decomposing at least a portion of the three dimensional ink-space into a union of tetrahedrons Δ determining a first piece-wise linear three-ink printer model by calculating for each tetrahedron a linear transformation A determining for each tetrahedron Δ counting a number n if n if n searching for a set of colors {p using the set of colors {p obtaining a second piece-wise linear three-ink printer model from a second set of color measurements that is regular by calculating for each tetrahedron a linear transformation F|Δ using the second piece-wise linear three-ink printer model to create separation tables to convert colors in an image into sets of three inks; using the separation tables to separate an image that is to be printed into a set of separations; and using the set of separations to print the image.