Method for describing an actual color gamut of a color device or of a color content

Abstract

To describe the actual color gamut, a hierarchical structure is proposed which comprises, from bottom to top:

Gamut Components: each GC is a surface, generally described as a set of connected elementary triangles or polygons.
Gamut Hulls: each GH is a closed surface formed by the concatenation of connex Gamut Components.
Gamut Instances: each GI is an alternative Gamut Boundary Description of the same actual gamut and is built by the union of the volume(s) bordered by at least one Gamut Hull.

Such a Gamut Boundary Information may be notably used for gamut mapping operations. Among advantages of the invention, are flexibility and adaptation to available memory and bandwidth capabilities.