Brightness scaling according to gamut relativity
Date
2014
Authors
Vladusich, T.
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Journal article
Citation
Color Research and Application, 2014; 39(5):463-465
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Abstract
Brill and Carter rekindle the question of whether brightness scaling is better approximated by a log or power function, proposing on theoretical and empirical grounds that the log function is the correct choice. This note provides a new twist to this debate in terms of a recently introduced theory of brightness and lightness perception, called gamut relativity. The theory reconciles the log and power function formulations and approximately predicts the weight/exponent values associated with these functions. The theory provides, moreover, a unified and testable approach to human performance in brightness magnitude estimation, discrimination and matching tasks.
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Copyright 2013 Wiley Periodicals