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Revisiting spatial vision: toward a unifying model

Itti, Laurent and Koch, Christof and Braun, Jochen (2000) Revisiting spatial vision: toward a unifying model. Journal of the Optical Society of America A, 17 (11). pp. 1899-1917. ISSN 1084-7529. PMCID 11059585. http://resolver.caltech.edu/CaltechAUTHORS:ITTjosaa00

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Abstract

We report contrast detection, contrast increment, contrast masking, orientation discrimination, and spatial frequency discrimination thresholds for spatially localized stimuli at 4° of eccentricity. Our stimulus geometry emphasizes interactions among overlapping visual filters and differs from that used in previous threshold measurements, which also admits interactions among distant filters. We quantitatively account for all measurements by simulating a small population of overlapping visual filters interacting through divisive inhibition. We depart from previous models of this kind in the parameters of divisive inhibition and in using a statistically efficient decision stage based on Fisher information. The success of this unified account suggests that, contrary to Bowne [Vision Res. 30, 449 (1990)], spatial vision thresholds reflect a single level of processing, perhaps as early as primary visual cortex.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1364/JOSAA.17.001899DOIArticle
http://www.opticsinfobase.org/josaa/abstract.cfm?uri=josaa-17-11-1899PublisherArticle
http://www.ncbi.nlm.nih.gov/pubmed/11059585PubMed Central IDPubMed Article
Additional Information:© 2000 Optical Society of America Received February 24, 2000; revised manuscript received May 10, 2000; accepted July 6, 2000 This work was supported by the National Science Foundation–sponsored Neuromorphic Engineering Research Center, the National Institute of Mental Health, the U.S. Office of Naval Research, and the Sloan Center for Theoretical Neurobiology. We thank Amit Manwani for comments on various theoretical aspects and Pietro Perona for discussions and help with the experimental setup.
Group:Koch Laboratory, KLAB
Funders:
Funding AgencyGrant Number
Neuromorphic Engineering Research Center, CaltechUNSPECIFIED
National Institute of Mental HealthUNSPECIFIED
U.S. Office of Naval Research UNSPECIFIED
Sloan Center for Theoretical NeurobiologyUNSPECIFIED
PubMed Central ID:11059585
Record Number:CaltechAUTHORS:ITTjosaa00
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:ITTjosaa00
PubMed Central ID:11059585
Alternative URL:http://www.opticsinfobase.org/abstract.cfm?URI=josaa-17-11-1899
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5881
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:06 Nov 2006
Last Modified:29 Aug 2014 17:27

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