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A simple estimation method for effective adaptation coefficient
Author(s) -
Nayatani Yoshinobu
Publication year - 1997
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/(sici)1520-6378(199708)22:4<259::aid-col6>3.0.co;2-o
Subject(s) - standard illuminant , chromatic adaptation , achromatic lens , luminance , adaptation (eye) , chromatic scale , computer science , simple (philosophy) , artificial intelligence , mathematics , computer vision , algorithm , optics , physics , philosophy , epistemology , combinatorics
A method was proposed in a previous article (CRA, 22, 240–258, 1997) to estimate the state of incomplete adaptation by using the effective chromatic adaptation coefficient α min . The method could be applied to any experiment on chromatic adaptation using object‐color or luminous‐color stimuli, but its computational procedure was rather tedious. For this reason, the two simple methods, Methods I and II, are proposed to give the approximate estimates of α min . Method I uses the corresponding reference color under reference illuminant to a test achromatic color under test illuminant. Method II uses the two kinds of relation equations between test adapting luminance and α min . The estimates of α min by each of the two methods agree fairly well with those given in the previous article to the three experiments studied. © 1997 John Wiley & Sons, Inc. Col Res Appl, 22, 259–268, 1997