Measurement of rate of expansion in the perception of radial motion.

Vision Res

Neuroscience Graduate Program, University of Southern California, Hedco Neuroscience Building, MC 2520, Los Angeles, CA 90089-2520, USA.

Published: October 2005

Optic flow generated by rigid surface patches can be decomposed into a small number of elementary motion types. In these experiments, we show that the human visual system can evaluate expansion, one of these motion types, metrically. Moreover, we show that the discrimination of rates of expansion are spatially local. Because the estimation of the focus of expansion is somewhat imprecise, this locality sometimes produces predictable errors in the estimation of rate of expansion. One can make predictions like this with a model adapted from one previously developed for angular-velocity discrimination.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.visres.2005.03.022DOI Listing

Publication Analysis

Top Keywords

rate expansion
8
motion types
8
expansion
5
measurement rate
4
expansion perception
4
perception radial
4
radial motion
4
motion optic
4
optic flow
4
flow generated
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!