Premium
Analyzing the natural color system's color‐order system by using a nonlinear color‐appearance model
Author(s) -
Nayatani Yoshinobu,
Umemura Yoshifumi,
Hashimoto Kenjiro,
Takahama Kotaro,
Sobagaki Hiroaki
Publication year - 1989
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.5080140207
Subject(s) - hue , artificial intelligence , color model , computer vision , object (grammar) , nonlinear system , lightness , color analysis , mathematics , color balance , scaling , color difference , computer science , pattern recognition (psychology) , color space , color image , image (mathematics) , physics , image processing , enhanced data rates for gsm evolution , geometry , quantum mechanics
The Natural Color System (NCS) is analyzed by using a nonlinear color‐appearance model. Perceptual uniformity was examined for each of the NCS attributes of blackness (s), chromaticness ( Cr ), and hue. Some nonuniformities were found in chromaticness and hue spacing, which were probably the result of the assessing and scaling method used in developing the system. In addition, a colorimetric interpretation is given to a principal plane in the NCS consisting of the colors with ( s,Cr ) = (50,0) and (0,100). The colors with (0,100) have different values of Y for different hues. Based on the analysis, a method is developed to predict the NCS attributes from the values x, y, Y of an object color by using the nonlinear color‐appearance model. The present analysis clarifies the importance of the NCS system in studying the color appearance of object colors.