Method and apparatus for effecting color separation, color variation, color characterization, and gamut mapping in color printing

摘要

Embodiments of the invention concern automatic color separation with a white ink for colored and/or transparent substrate, automatic color separation with a silver ink for a natural rendering, automatic color separation with a varnish which has a gloss scale different from that of the printed sample for all shades of gloss that are possible between high glossy to high matte for a false third rendering, automatic color variation with variable thickness under the inks, and variable gamut mapping for a low contrast space.

主权项

1. A computer implemented method for automatic color separation with a white ink for a colored substrate, comprising:
receiving a low contrast image having no information regarding a white scale; generating a half-toned white layer to compensate for the low contrast image when said image is printed on a colored substrate; and printing said image using transparent process inks and printing said half-toned white layer using an opaque white ink by applying a rule for making a smooth transition between areas with white ink and those without white ink based on a fixed anchor point used to generate, using linear interpolation, another combination of CMYK+W.