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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: 20 October 2021

Calculating Appearances in Complex and Simple Images

Calculating Appearances in Complex and Simple Images

(p.231) Chapter 24 Calculating Appearances in Complex and Simple Images
Normal and Defective Colour Vision

John J. Mccann

Oxford University Press

This chapter studies the visual effects of segmented surrounds to understand the transition from contrast to assimilation. Contrast is a complex spatial mechanism that is evident with simple centre-surround displays. It can be shut off, and reintroduced by the spatial pattern of outer-surround elements. Assimilation in periodic displays is a simple mechanism found in the absence of contrast. It depends on the average value of very large-receptive fields.

Keywords:   segmented surrounds, assimilation, contrast

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