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A revision of the CIECAM97s model
Author(s) -
Li C. J.,
Luo M. R.,
Hunt R. W. G.
Publication year - 2000
Publication title -
color research and application
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 62
eISSN - 1520-6378
pISSN - 0361-2317
DOI - 10.1002/1520-6378(200008)25:4<260::aid-col6>3.0.co;2-9
Subject(s) - confusion , zero (linguistics) , lightness , chromatic scale , value (mathematics) , mode (computer interface) , mathematics , field (mathematics) , computer science , contrast (vision) , calculus (dental) , algorithm , mathematical economics , artificial intelligence , philosophy , pure mathematics , statistics , psychology , combinatorics , linguistics , psychoanalysis , medicine , dentistry , operating system
The CIECAM97s model was adopted by the CIE in 1997 for colour imaging applications. It includes forward and reverse modes. Some problems in using this model were found in recent field trials. This article suggests revision to the model in two respects: (a) to make the lightness ( J ) zero when the Y tristimulus value is zero, under all surround conditions; (b) to modify the chromatic induction factor (Nc) from 1.10 to 0.95 for the dim surround condition. To avoid confusion, it is suggested that the revised version of the model be designated CAM97s2. The article also describes an alternative mode to achieve a more nearly exact reversibility between the forward and reverse modes. © 2000 John Wiley & Sons, Inc. Col Res Appl, 25, 260–266, 2000