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1. (WO2018023002) SEPARATING A DIGITAL IMAGE USING A SPECIFIED COLOUR PALETTE

Pub. No.:    WO/2018/023002    International Application No.:    PCT/US2017/044385
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Sat Jul 29 01:59:59 CEST 2017
IPC: H04N 1/56
Applicants: REPRESENT HOLDINGS, LLC
Inventors: PANCIK, Andrej
SOTAK, Simon
Title: SEPARATING A DIGITAL IMAGE USING A SPECIFIED COLOUR PALETTE
Abstract:
Separating a digital image using a specified colour palette into a sequence of separation plates, comprising receiving the image and the palette; setting a desired integer number of ink quantization levels; determining a plurality of ink levels; combining the ink levels for each of the printing inks forming a list of possible ink combinations; calculating colour values for composite colours by linear combination of the colour values of each possible combination weighted by the levels, for each pixel colour value in the digital image finding the potential colour separation combination colour value that is the closest to the pixel colour value, adding each of the printing ink-ink level pairs to a final combination colour palette, and including each of the pixels associated with the pixel colour value on a separation plate logically associated with each of the printing inks that resulted in the closest potential colour separation combination colour value.