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Lightness perception of chromatic object colors
Author(s) -
Nayatani Yoshinobu,
Umemura Yoshifumi,
Sobagaki Hiroaki,
Takahama Kotaro,
Hashimoto Kenjiro
Publication year - 1991
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.5080160106
Subject(s) - lightness , hue , chromatic scale , mathematics , artificial intelligence , object (grammar) , chromatic adaptation , perception , computer vision , psychology , computer science , combinatorics , neuroscience
A hypothesis is proposed to predict the perceived lightness of chromatic object colors, which is well known as the Helmholtz‐Kohlrausch effect or the lightness‐reflectance ratio effect ( L/Y effect). The hypothesis is, “When two chromatic object colors with different hues have the same values for each of three attributes (whiteness, blackness, and chromaticness), the two colors have the same perceived lightness, including a chromatic‐component contribution.” The hypothesis is tested by two kinds of experiments: perceivedlightness matching using the NCS Color Atlas, and chromatic tiles determined by Wyszecki. Both results strongly confirm the hypothesis. Further, contour lines of constant L/Y ratios are estimated, and are very similar to those reported previously.