Document Detail

Neon flank and illusory contour: interaction between the two processes leads to color filling-in.
MedLine Citation:
PMID:  1437450     Owner:  NLM     Status:  MEDLINE    
Two aspects of neon color spreading, local color spreading (neon flank) and illusory contour, were investigated by dichoptic viewing. Neon flank was not observed under appropriate dichoptic stimulation, suggesting that input to the process for local color spreading is based on monocular configuration. However, illusory contours were formed according to the interocularly combined configuration rather than according to each monocular configuration, suggesting that input to the process responsible for illusory contours should be ocularly-nonselective and binocular, rather than monocular. The possibilities of artifacts such as those arising from interocular rivalry were appropriately eliminated, and thus, it is tentatively concluded that the process underlying local color spreading is monocularly driven, whereas the process underlying illusory contours is binocularly driven. Furthermore, a new demonstration is presented that indicates that interocularly-induced illusory contours 'capture' and extend the monocularly-induced local color spreading, resulting in global color spreading (neon color spreading). These results support our hypotheses that neon color spreading involves two separable processes in the early visual processing, the feature detection process (for local color spreading) and the illusory contour process, and that these two processes interact with each other at later stages of cortical processing. The relation of local color spreading and illusory contours to surface separation is also discussed.
H Takeichi; S Shimojo; T Watanabe
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Perception     Volume:  21     ISSN:  0301-0066     ISO Abbreviation:  Perception     Publication Date:  1992  
Date Detail:
Created Date:  1992-12-09     Completed Date:  1992-12-09     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372307     Medline TA:  Perception     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  313-24     Citation Subset:  IM    
Department of Psychology, College of Arts and Sciences, University of Tokyo, Japan.
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MeSH Terms
Color Perception*
Equipment Design
Form Perception*
Optical Illusions*
Research Design
Visual Perception*

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