Document Detail


Precise assessment of the mean effective luminance of texture patches--an approach based on reverse-phi motion.
MedLine Citation:
PMID:  8994579     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In studying the response of mechanisms to contrast-defined texture stimuli, it is critical that the average effective luminance of these textures be equal to that of the background, to minimize net luminance-based signals. We present an efficient and accurate technique for constructing such equiluminant textures to isolate contrast-sensitive mechanisms for investigating their properties. The technique is based on the reverse-phi motion phenomenon, and the resulting settings agree closely with those obtained by photometric means for the class of textures studied. The method also allows one to explore the properties of contrast- and luminance-driven motion mechanisms and, in particular, to evaluate the contribution of putative second-order mechanisms to the motion percept. Results of applying the method are presented, and its advantages over the minimum-flicker and minimum-motion techniques are discussed.
Authors:
T V Papathomas; A Gorea; C Chubb
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Vision research     Volume:  36     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1996 Dec 
Date Detail:
Created Date:  1997-02-24     Completed Date:  1997-02-24     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  3775-84     Citation Subset:  IM; S    
Affiliation:
Laboratory of Vision Research, Rutgers, State University of New Jersey, Piscataway 08854, USA. papathom@rci.rutgers.edu
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MeSH Terms
Descriptor/Qualifier:
Humans
Lighting*
Models, Psychological
Motion Perception / physiology*
Photic Stimulation / methods*
Photometry
Psychophysics

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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