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Effects of Optic-Flow Density on the Metric Estimation of Rotation and Expansion

Wurfel, Jeff D. and Barraza, Jose F. and Grzywacz, Norberto M. (2004) Effects of Optic-Flow Density on the Metric Estimation of Rotation and Expansion. In: 11th Joint Symposium on Neural Computation, 15 May 2004, University of Southern California. (Unpublished) http://resolver.caltech.edu/CaltechJSNC:2004.poster029

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Abstract

Optic flow generated by rigid surface patches can be decomposed into four elementary motion types. We have shown that the human visual system can metrically estimate two of these motion types, rotation and expansion, by angular velocity and rate of expansion respectively. However, this contradicts previous work that reported linear velocity to be the parameter estimated. This discrepancy was caused by a difference in experimental methods. Experimental evidence shows that the visual system uses a different motion parameter based on the amount of motion information available. We've modeled this systematic switchover in information utilized in a probabilistic manner. Specifically, low motion information stimuli have a higher probability of being estimated by linear velocity than high motion information stimuli


Item Type:Conference or Workshop Item (Poster)
Record Number:CaltechJSNC:2004.poster029
Persistent URL:http://resolver.caltech.edu/CaltechJSNC:2004.poster029
Usage Policy:You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format
ID Code:29
Collection:CaltechCONF
Deposited By: Imported from CaltechJSNC
Deposited On:09 Jul 2004
Last Modified:24 Oct 2011 21:36

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