ICC has announced a preliminary specification for iccMAX, a next-generation colour management system that expands
the existing ICC profile format and architecture to overcome the limitation of the fixed colorimetric Profile Connection
Space and support a much wider range of functionality. New features introduced in iccMAX include spectral processing,
material identification and visualization, BRDF, new data types, an improved gamut boundary descriptor and support for
arbitrary and programmable transforms. The iccMAX preliminary specification is accompanied by a reference
implementation, and will undergo a period of public review before being finalized.
All imaging devices have two gamuts: the stimulus gamut and the response gamut. The response gamut of a print engine is typically described in CIE colorimetry units, a system derived to quantify human color response. More fundamental than colorimetric gamuts are spectral gamuts, based on radiance, reflectance or transmittance units. Spectral gamuts depend on the physics of light or on how materials interact with light and do not involve the human's photoreceptor integration or brain processing. Methods for visualizing a spectral gamut raise challenges as do considerations of how to utilize such a data-set for producing superior color reproductions. Recent work has described a transformation of spectra reduced to 6-dimensions called LabPQR. LabPQR was designed as a hybrid space with three explicit colorimetric axes and three additional spectral reconstruction axes. In this paper spectral gamuts are discussed making use of LabPQR. Also, spectral gamut mapping is considered in light of the colorimetric-spectral duality of the LabPQR space.