Local and global motion signals and their interaction in space and time

Abstract

The general issue of how we integrate local (isolated) signals into what is often termed a global percept is fundamental within vision research. The contribution by Braddick and Qian (this volume) deals specifically with the integration of local motion signals into a global motion percept but the combination of dispersed signals is a general problem with which the visual system must deal continuously. To address both the issues of general signal integration and the specific case of motion-signal integration, this commentary takes three parts. Firstly, an experimental stimulus is usually designed to simulate some component of a natural scene, so the definition of “global motion” will be discu..