 |
| Research article summary (published 30 Dec 2001): |
The role of ON- and OFF-channel processing in the detection of bilateral symmetry.
Full Abstract
We present evidence that grouping for luminance does not take precedence over the detection of bilaterally symmetrical patterns. Using single-axis and double-axis images, we found that element pairs within which luminance is held constant drive symmetry-detection mechanisms more effectively than pairs within which luminance varies. Moreover, the performance decrement observed for patterns defined by element pairs within which luminance varies is not specific to interchannel variation. Luminance variation within the ON and OFF channels has the same effect as variation between the channels on the performance of axis-orientation identification tasks. It is argued that this constitutes possible evidence for subchannels within the ON and OFF channels. One of the characteristics of the subchannels is that each processes only a limited range of luminance steps. The implications of this type of luminance processing for the detection of symmetry in the visual scene are discussed.
Learn Faster Today Improve your study skills
Author information
Author/s: Brooks, Anna (A); van der Zwan, Rick (R);
Affiliation: Vision Sciences Laboratory, School of Psychology, James Cook University, Cairns, QLD, Australia. anna.brooks@jcu.edu.au
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: Perception (Perception), published in England. (Language: eng)
Reference: 2002-; vol 31 (issue 9) : pp 1061-72
Dates: Created 2002/10/11; Completed 2002/11/22; Revised 2006/11/15;
PMID: 12375872, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
External Links for this article (including full text providers, if available):
Click Electronic Full-text Provider Links to see options for finding the electronic full text links to this article. Note there may be a subscription or fee required for access to the full text. See our FAQ for information on finding FREE full text articles.
This article may also be located in paper journal collections available in many libraries. Use the Journal and Publication Information above to find the full article.
MeSH headings (categories)
This article was linked to the MESH Headings shown below.
|
Related articles
This article has not been indexed for related articles as yet, however you can still use the live related article search links below.
See a large map of 100+ related articles.