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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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Geometric Illusions in the Human Face and Body

Geometric Illusions in the Human Face and Body

Chapter:
(p.252) Chapter 26 Geometric Illusions in the Human Face and Body
Source:
The Oxford Compendium of Visual Illusions
Author(s):

Kazunori Morikawa

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199794607.003.0026

Clothing and cosmetic makeup take advantage of visual illusions so as to make the human body and face look more attractive. This chapter lists such real-life geometric illusions and reviews studies that psychophysically measured them. These illusions include the Müller-Lyer illusion, the Helmholtz illusion, the Delboeuf illusion, the “bicolor” illusion, the “shape echo” illusion, and perceptual completion. Puzzling characteristics of these bodily illusions, which can be called “biological illusions,” are discussed. The ways in which geometric illusions in the human face and body differ from classical geometric illusions consisting of simple lines are also discussed, and the concept of “biological motion” as a separate field is proposed.

Keywords:   illusion, face, body, makeup, perceptual completion, biological illusions

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