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Normal and Defective Colour Vision$
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John D. Mollon, Joel Pokorny, and Ken Knoblauch

Print publication date: 2003

Print ISBN-13: 9780198525301

Published to Oxford Scholarship Online: April 2010

DOI: 10.1093/acprof:oso/9780198525301.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 19 October 2021

Tritanopic Colour Constancy Under Daylight Changes?

Tritanopic Colour Constancy Under Daylight Changes?

(p.218) Chapter 22 Tritanopic Colour Constancy Under Daylight Changes?
Normal and Defective Colour Vision

David H. Foster

Kinjiro Amano

SÉrgio M. C. Nascimento

Oxford University Press

This chapter addresses the question of how colour constancy judgments vary under daylight changes. An experiment was performed to estimate the distributional properties of colour-constancy. An operational approach was adopted in which observers were required to distinguish illuminant changes on a scene from changes in the reflecting properties of the surfaces comprising it. The distribution of responses was anisotropic: observers were less able to detect spectral reflectance changes in one direction than in another. The long axis of the distribution is close to the tritanopic confusion line, although biased towards the daylight locus.

Keywords:   colour constancy judgments, daylight changes, illuminant changes, anisotropy

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