Some varieties of shadow illusions: split shadows, occluded shadows, stolen shadows, and shadows of shadows. Perception, 41, 357-360

Shadows are visual objects and as such are subject to preference rules for segmenting the visual scene (such as Gestalt laws). These rules govern shadows along two dimensions: their general unity and individuation (e.g., they describe a certain area as a unitary shadow as opposed to a set of two dis...

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Bibliographic Details
Published in:	Perception (London) Vol. 41; pp. 357 - 360
Main Author:	Casati, Roberto
Format:	Journal Article
Language:	English
Published:	SAGE Publications 2012
Subjects:	Cognitive science domain_scco.cogpsy shadows illusions perception
Online Access:	Get full text
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Summary:	Shadows are visual objects and as such are subject to preference rules for segmenting the visual scene (such as Gestalt laws). These rules govern shadows along two dimensions: their general unity and individuation (e.g., they describe a certain area as a unitary shadow as opposed to a set of two distinct shadows) and their being the shadow of a given object, as opposed to being the shadow of any other object in the scene (the Shadow Correspondence Problem, Mamassian 2004). We describe a few phenomena that indicate the interplay of preferences in determining the final visual aspect of scenes in which shadows are present.
ISSN:	0301-0066 1468-4233