PSYC 4365 Lecture Notes - Lecture 22: Optical Flow, Biological Motion, Smooth Pursuit
Document Summary
Optic array: the collection of light rays that interact with objects in the world in front of a viewer. Optic flow: the changing angular position of points in a perspective image that we experience as we move through the world. The focus of expansion tells the observer which way they are heading: biological motion: the pattern of movement of all animals. Tau ( ): information in the optic flow that could signal ttc without the necessity of estimating either absolute distances or rates. The ratio of the retinal image size at any moment to the rate at which the image is expanding is tau, and ttc is proportional to tau. After all, both items moved across our retinas to the left. Because in the second case there was an eye movement: types of eye movements: Smooth pursuit: the eyes smoothly follow a moving target.
