The AMBEGUJAS phenomenon and colour constancy.

Abstract:

:The AMBEGUJAS phenomenon is a reversible flat figure that is spontaneously shifting between two apparent 3-D shapes-'tile' and 'roof'. 2-D perceptions have very rarely been reported. Tied to the shifts between the tile and roof shapes are remarkable changes of perceived colour. In our example, the tile appears to have orange (top half) and blue-green (bottom half) surface colours in white light. The roof appears grey but in an orange illumination and with a blue-green shadow. This phenomenon appears whether a grey display is presented in two coloured illuminations, or a chromatic display with two surface colours (orange and blue-green) is presented in white light. In the coloured illuminations the tile is an example of non-constancy, since its colours are non-veridical colour perceptions. The centre stripe of the display appears to have the same orange and blue-green colours as the lateral stripes but in a shadow. This seems like a colour constancy in a non-constancy situation. An alternative to the classical definition of colour constancy is discussed.

journal_name

Perception

journal_title

Perception

authors

Bergström SS

doi

10.1068/p5126

keywords:

subject

Has Abstract

pub_date

2004-01-01 00:00:00

pages

831-5

issue

7

eissn

0301-0066

issn

1468-4233

journal_volume

33

pub_type

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