 |
| Research article summary (published 30 Aug 2009): |
Orientation disparity: a cue for 3D orientation?
Full Abstract
Orientation disparity, the difference in orientation that results when a texture element on a slanted surface is projected to the two eyes, has been proposed as a binocular cue for 3D orientation. Since orientation disparity is confounded with position disparity, neither behavioral nor neurophysiological experiments have successfully isolated its contribution to slant estimates or established whether the visual system uses it. Using a modified disparity energy model, we simulated a population of binocular visual cortical neurons tuned to orientation disparity and measured the amount of Fisher information contained in the activity patterns. We evaluated the potential contribution of orientation disparity to 3D orientation estimation and delimited the stimulus conditions under which it is a reliable cue. Our results suggest that orientation disparity is an efficient source of information about 3D orientation and that it is plausible that the visual system could have mechanisms that are sensitive to it. Although orientation disparity is neither necessary nor sufficient for estimating slant, it appears that it could be useful when combined with estimates from position disparity gradients and monocular perspective cues.
Author information
Author/s: Greenwald, Hal S (HS); Knill, David C (DC);
Affiliation: Center for Visual Science, University of Rochester, Rochester, NY 14627, USA. hal.greenwald(-atsign-)gmail.com
Grants: EY017939 (Agency:NEI NIH HHS)
Journal and publication information
Publication Type: Journal Article; Research Support, N.I.H., Extramural
Journal: Neural computation (Neural Comput), published in United States. (Language: eng)
Reference: 2009-Sep; vol 21 (issue 9) : pp 2581-604
Dates: Created 2009/08/14; Completed 2009/09/17;
PMID: 19548796, status: MEDLINE (last retrieval date: 9/17/2009, IMS Date: )
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
These are the highest related articles currently in the database:
- Role of primate visual area V4 in the processing of 3-D shape characteristics defined by disparity.
27 Jun 2005 - Encoding of three-dimensional surface slant in cat visual areas 17 and 18. 2 Jan 2006
- Distance in feature space determines exclusivity in visual rivalry.
20 Oct 2007 - Inter-ocular transfer of stimulus cueing in dominance selection at the onset of binocular rivalry. 11 Mar 2007
- Quantitative characterization of disparity tuning in ventral pathway area V4. 27 Jun 2005
- Functional connectivity of disparity-tuned neurons in the visual cortex. 8 Dec 2003
- Adaptation to natural binocular disparities in primate V1 explained by a generalized energy model. 8 Jan 2008
- Direct extraction of curvature-based metric shape from stereo by view-modulated receptive fields. 4 Sep 2006
- Minimal physiological conditions for binocular rivalry and rivalry memory. 28 Aug 2007
- Quantitative analysis of the responses of V1 neurons to horizontal disparity in dynamic random-dot stereograms. 30 Dec 2001
Related Article Map
12/30/2001
1/8/2008
Higher Relevance Score (100)
Lower Relevance Score (71)
Legend: - FREE Full text Article. - Abstract only. 
- Title only. More help.
See a large map of 100+ related articles.