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Proceedings Paper

Perceptual learning of categorical color constancy and the role of illuminant familiarity
Author(s): J. A. Richardson; Ian R. L. Davies
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Paper Abstract

It is known that colour constancy is more robust when the changes in illumination are restricted to the phases of daylight than it is for changes in most arti ficial 1 ight sources, suggesting that the ability to correctly identify surface colours may depend in part, on the observers familiarity with the light source. The present study examines whether a relatively short period of practice in judging surface colours under different illuminants leads to an improvement in colour constancy, and if so whether the improvement is restricted to the illuminants under which the judgeinents were made. Five subjects were asked to identify by name (chosen from 11 basic colour terms) a total of 70 colour patches under 4 different broad band illuininants. Subjects then named each colour patch a further 20 times distributed over a 2 week period, 10 times under each of two of the broad band illuminants. Finally, subjects again named the patches under all 4 illuminants. It was found that the degree of categorical colour constancy under broad band illumination was significantly better after the learning trials, and that the improvement was greater for the illuminants used in the learning trials.

Paper Details

Date Published: 10 April 1995
PDF: 11 pages
Proc. SPIE 2414, Device-Independent Color Imaging II, (10 April 1995); doi: 10.1117/12.206552
Show Author Affiliations
J. A. Richardson, Univ. of Surrey (United Kingdom)
Ian R. L. Davies, Univ. of Surrey (United Kingdom)

Published in SPIE Proceedings Vol. 2414:
Device-Independent Color Imaging II
Eric Walowit, Editor(s)

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