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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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The Aperture Capture Illusion

The Aperture Capture Illusion

Chapter:
(p.700) Chapter 102 The Aperture Capture Illusion
Source:
The Oxford Compendium of Visual Illusions
Author(s):

Evan M. Palmer

Philip J. Kellman

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199794607.003.0102

Perception of object shape is typically accurate and robust, even when objects move behind occluding surfaces, thus fragmenting their visible regions across space and over time. However, when an object is seen moving behind an occluding surface with only two misaligned apertures, a striking perceptual illusion occurs. The object appears distorted in the same direction as the offset of the apertures. This “aperture capture illusion” reveals the limits of spatiotemporal object formation and gives clues as to how the human visual system perceives dynamically occluded objects under normal circumstances. These concepts as well as related factors are explored in this chapter.

Keywords:   aperture capture illusion, occluding surface, perceptual illusion, aperture, spatiotemporal object formation, visual system

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