CIE Division 8 - TC8-03: Survey of Gamut Mapping Papers

Marcu (1998)

Like Braun and Fairchild (1998), this paper too is concerned about arriving at a hue-uniform colour space for gamut mapping. The Munsell colour order system is taken as the source of hue-uniform data and CIELAB is transformed accordingly (whereby the transformed CIELAB is called mLAB). The following five gamut mapping algorithms, all of which keep hue unaltered, were investigated in mLAB:

(a) constant lightness clipping
(b) constant chroma clipping
(c) combination of (a) and (b)
(d) clipping towards the centre of the gamut
(e) mapping to a variable point on the lightness axis (Marcu and Abe, 1996)

The evaluation showed that the mLAB space was preferred over CIELAB in 21 out of 25 cases. As far as the GMAs were concerned, method (e) was preferred over methods (a), (b) and (c). The experimental results presented here are preliminary ones and the author intended to continue the evaluation using further observers.

Last updated: 17 August 1999 by Jan Morovic