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Illuminance dependency of L/Y (lightness/luminance‐factor)‐ratio effect
Author(s) -
Nayatani Yoshinobu,
Sobagaki Hiroaki,
Hashimoto Kenjiro
Publication year - 1993
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.5080180307
Subject(s) - illuminance , lightness , chromaticity , gamut , luminance , mathematics , chromatic scale , brightness , color difference , optics , artificial intelligence , physics , computer science , combinatorics , enhanced data rates for gsm evolution
Using a modified model for predicting the perceived lightness of chromatic object colors for various adapting illuminances, the following two kinds of predictions were done for seven illuminance levels from 2 to 3000 lx on the basis of the Wysecki data. One concerned the contour lines of equal L/Y (lightness/luminance‐factor) ratios in the whole chromaticity gamut, and the other the values of L/Y ratios for spectral colors. All the colors predicted have tristimulus value Y = 20. The computed results confirmed that the difference of L/Y ‐ratio effect found between the Wysecki and the Sanders‐Wyszecki experiment was caused by the difference of the test adapting illuminance between them.