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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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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: 28 September 2021

The Picture Surface Illusion

The Picture Surface Illusion

3D Biases 2D

(p.209) Chapter 19 The Picture Surface Illusion
The Oxford Compendium of Visual Illusions

Sherief Hammad

John M. Kennedy

Oxford University Press

Two-dimensional angles on a picture surface are misperceived. Angles of 40º to 65º and 120º to 160º in a quadrilateral depicting the top of a cube are heavily biased toward the pictured angle (90º). The illusion is likely due to 3D information (e.g., eccentricity depicting foreshortening). Information for the picture surface lessens the effect. Information on the picture surface illusion is covered in this chapter, including the related concepts of 3D and 2D biases and the effect of parameters. The chapter concludes that drawing is likely to be affected by the picture surface illusion, especially in copying a picture. When a V shape in a drawing is surrounded with features suggesting 3D, the V shape will change its apparent shape.

Keywords:   picture, surface, illusion, perspective, cube, angle

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