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Revision of the chroma and hue scales of a nonlinear color‐appearance model
Author(s) -
Nayatani Yoshinobu
Publication year - 1995
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/col.5080200304
Subject(s) - hue , lightness , color model , chromatic scale , mathematics , spectral color , color vision , perception , artificial intelligence , color space , computer vision , computer science , psychology , image (mathematics) , combinatorics , neuroscience
The following questions were raised to chroma and hue scales of the nonlinear color‐appearance model: 1) significant nonuniformities of the chroma scales for different hues, and 2) deviations of hue scale between the model and the Munsell and the NCS schemes. It was suggested that the problems were caused by the use of the coefficient e s (0) proposed by Hunt. Instead of e s (0), a new coefficient E s (0) was proposed, which corresponds to the chromatic strengths of spectral colors (including colors on the redpurple locus). By using E s (0), the nonlinear color‐appearance model could predict the hue and chroma scales of the Munsell and the NCS schemes quite nicely. the method in the present study is generally applicable for determining hue and chroma perceptions of object colors irrespective of the color‐appearance model used.