Method of coding a first and a second version of an image into a base layer and an enhancement layer based on a color gamut mapping model

摘要

The method comprises the steps of:- determining, for each color of the second version, corresponding scalar value(s) of one or two variable(s) such that, if said scalar value(s) is applied to the color gamut mapping model, a mapped color is obtained having a minimal distance to the corresponding color of the first version (i.e. enhanced) to the color of second version,- encoding the determined scalar value(s) into an enhancement layer.