Document Detail


Motion-induced position shifts in global dynamic Gabor arrays.
MedLine Citation:
PMID:  20055541     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Objects in motion appear shifted in space. For global motion stimuli we can ask whether the shift depends on the local or global motion. We constructed arrays of randomly oriented Gaussian enveloped drifting sine gratings (dynamic Gabors) whose speed was set such that the normal component of motion was consistent with a single global velocity. The array appears shifted in space in the direction of the global motion. The size of the shift is the same as for arrays of uniformly oriented dynamic Gabors that are moving in the same direction at the same global speed. Arrays made up of vertically oriented gratings whose speeds were set to the horizontal component of the random array elements were shifted less far. This shows that motion-induced position shifts of coherently moving surface patches are generated after the completion of the global motion computation.
Authors:
Andrew T Rider; Peter W McOwan; Alan Johnston
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-12-08
Journal Detail:
Title:  Journal of vision     Volume:  9     ISSN:  1534-7362     ISO Abbreviation:  J Vis     Publication Date:  2009  
Date Detail:
Created Date:  2010-01-08     Completed Date:  2010-03-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101147197     Medline TA:  J Vis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  8.1-8     Citation Subset:  IM    
Affiliation:
Department of Cognitive, Perceptual and Brain Sciences, University College London, London, UK. a.rider@ucl.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Contrast Sensitivity / physiology
Humans
Motion Perception / physiology*
Optical Illusions / physiology*
Pattern Recognition, Visual / physiology*
Photic Stimulation / methods
Sensory Thresholds / physiology
Grant Support
ID/Acronym/Agency:
//Biotechnology and Biological Sciences Research Council

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