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The Oxford Compendium of Visual Illusions$
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Arthur G. Shapiro and Dejan Todorovic

Print publication date: 2017

Print ISBN-13: 9780199794607

Published to Oxford Scholarship Online: June 2017

DOI: 10.1093/acprof:oso/9780199794607.001.0001

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Color Assimilation

Color Assimilation

(p.388) Chapter 50 Color Assimilation
The Oxford Compendium of Visual Illusions

Frederick A. A. Kingdom

Oxford University Press

Color assimilation, also known as the Von Bezold spreading effect, is the phenomenon in which the perceived color of a region shifts toward that of its neighbor. This chapter describes the traditional form of color assimilation as well as three “special cases” where the effects are particularly dramatic: the chromatic White’s Effect, Monnier and Shevell’s ring patterns, and neon-color spreading. Three potential causes of color assimilation are discussed: neural blurring, contrast normalization, and perceptual layer decomposition. All three of these could contribute to White’s Effect, and their relation to the other two cases are also discussed. Discussion on assimilation versus contrast and the effect of simulation contrast is included, and several figures are provided that illustrate the concepts.

Keywords:   color, assimilation, Van Bezold spreading effect, White’s Effect, Monnier and Shevell, ring pattern, neon-color spreading

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