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Learning different light prior distributions for different contexts

Record type: Article

The pattern of shading across an image can provide a rich sense of object shape. Our ability to use shading information is remarkable given the infinite possible combinations of illumi- nation, shape and reflectance that could have produced any given image. Illumination can change dramatically across environments (e.g. indoor vs. outdoor) and times of day (e.g. mid-day vs. sunset). Here we show that people can learn to associate particular illumination conditions with particular contexts, to aid shape-from-shading. Following a few hours of visual–haptic training, observers modified their shape estimates according to the illumina- tion expected in the prevailing context. Our observers learned that red lighting was roughly overhead (consistent with their previous assumption of lighting direction), whereas green lighting was shifted by 10°. Greater learning occurred when training for the two contexts (red or green light) was intermingled rather than when it was sequentially blocked

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Kerrigan, Iona S and Adams, Wendy J. (2013) Learning different light prior distributions for different contexts Cognition, 127, (1), pp. 99-104. (doi:10.1016/j.cognition.2012.12.011).

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e-pub ahead of print date: January 2013
Published date: April 2013
Organisations: Psychology


Local EPrints ID: 347779
ISSN: 0010-0277
PURE UUID: 3326c338-f43c-40c1-bf9b-c4c802871993
ORCID for Wendy J. Adams: ORCID iD

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Date deposited: 30 Jan 2013 15:29
Last modified: 18 Jul 2017 04:56

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Author: Iona S Kerrigan
Author: Wendy J. Adams ORCID iD

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