Accuracy of velocity estimation by Reichardt correlators

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dc.contributor.authorDror, R.
dc.contributor.authorO'Carroll, D.
dc.contributor.authorLaughlin, S.
dc.date.issued2001
dc.descriptionCopyright © 2001 Optical Society of America
dc.description.abstractAlthough a great deal of experimental evidence supports the notion of a Reichardt correlator as a mechanism for biological motion detection, the correlator does not signal true image velocity. This study examines the accuracy with which realistic Reichardt correlators can provide velocity estimates in an organism's natural visual environment. The predictable statistics of natural images imply a consistent correspondence between mean correlator response and velocity, allowing the otherwise ambiguous Reichardt correlator to act as a practical velocity estimator. Analysis and simulations suggest that processes commonly found in visual systems, such as prefiltering, response compression, integration, and adaptation, improve the reliability of velocity estimation and expand the range of velocities coded. Experimental recordings confirm our predictions of correlator response to broadband images.
dc.description.statementofresponsibilityR. O. Dror, D. C. O'Carroll, and S. B. Laughlin
dc.identifier.citationJournal of the Optical Society of America A: Optics, Image Science and Vision, 2001; 18(2):241-252
dc.identifier.doi10.1364/JOSAA.18.000241
dc.identifier.issn1084-7529
dc.identifier.issn1520-8532
dc.identifier.orcidO'Carroll, D. [0000-0002-2352-4320]
dc.identifier.urihttp://hdl.handle.net/2440/11964
dc.language.isoen
dc.publisherOptical Soc Amer
dc.source.urihttp://josaa.osa.org/abstract.cfm?id=62946
dc.subjectAnimals
dc.subjectDiptera
dc.subjectMotion Perception
dc.subjectMotion
dc.subjectModels, Biological
dc.subjectTime Factors
dc.subjectComputer Simulation
dc.titleAccuracy of velocity estimation by Reichardt correlators
dc.typeJournal article
pubs.publication-statusPublished

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