Document Detail


Characteristics of grouping colors for figure segregation on a multicolored background.
MedLine Citation:
PMID:  18978838     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A figure is segregated from its background when the colored elements belonging to the figure are grouped together. We investigated the range of color distribution conditions in which a figure could be segregated from its background using the color distribution differences. The stimulus was a multicolored texture composed of randomly shaped pieces. It was divided into two regions: a test region and a background region. The pieces in these two regions had different color distributions in the OSA Uniform Color Space. In our experiments, the subject segregated the figure of the test region using two different procedures. Since the Euclidean distance in the OSA Uniform Color Space corresponds to perceived color difference, if segregation thresholds are determined by only color difference, the thresholds should be independent of position and direction in the color space. In the results, however, the thresholds did depend on position and direction in the OSA Uniform Color Space. This suggests that color difference is not the only factor in figure segregation by color. Moreover, the threshold dependence on position and direction is influenced by the distances in the cone-opponent space whose axes are normalized by discrimination thresholds, suggesting that figure segregation threshold is determined by similar factors in the cone-opponent space for color discrimination. The analysis of the results by categorical color naming suggests that categorical color perception may affect figure segregation only slightly.
Authors:
Takehiro Nagai; Keiji Uchikawa
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the Optical Society of America. A, Optics, image science, and vision     Volume:  25     ISSN:  1084-7529     ISO Abbreviation:  J Opt Soc Am A Opt Image Sci Vis     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-11-03     Completed Date:  2009-02-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9800943     Medline TA:  J Opt Soc Am A Opt Image Sci Vis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2618-29     Citation Subset:  IM    
Affiliation:
Department of Information Processing, Tokyo Institute of Technology, Yokohama, Japan. tnagai@ucsd.edu
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MeSH Terms
Descriptor/Qualifier:
Adult
Color
Color Perception*
Color Perception Tests
Humans
Light
Male
Models, Statistical
Optical Processes
Reproducibility of Results
Vision, Ocular

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


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