Performance characterization of Watson Ahumada motion detector using random dot rotary motion stimuli.

ABSTRACT: The performance of Watson & Ahumada's model of human visual motion sensing is compared against human psychophysical performance. The stimulus consists of random dots undergoing rotary motion, displayed in a circular annulus. The model matches psychophysical observer performance with respect to most parameters. It is able to replicate some key psychophysical findings such as invariance of observer performance to dot density in the display, and decrease of observer performance with frame duration of the display.Associated with the concept of rotary motion is the notion of a center about which rotation occurs. One might think that for accurate estimation of rotary motion in the display, this center must be accurately known. A simple vector analysis reveals that this need not be the case. Nume

SUBMITTER: Jain S 

PROVIDER: S-EPMC2640429 | biostudies-literature | 2009

REPOSITORIES: biostudies-literature