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

Johnson (1979)

Figure 1 Gamut mapping in plane of constant hue (A ? original colour, B ? gamut mapped colour).

The method proposed by Johnson is based on the ërelativityí proposal made by Evans (1943) who said that "the rendition of some colours must not be better than that of others." Therefore the following rules were suggested as a gamut mapping algorithm (Figure 1):

maintain hue
compress perceived lightness linearly (using Bartleson?Breneman Lightness (Bartleson and Breneman, 1967))
compress perceived colourfulness (chroma) linearly

Note, that the description of this algorithm was taken from a CARISMA Project Report (1992) as the original paper was not available.

Last updated: 17 August 1999 by Jan Morovic