Time-Varying Image Formation

Vision is the process of inferring scene/world properties from images. Our specific concern is with image sequences and spatiotemporal variations in image intensity. It is therefore natural to begin with a discussion of image formation, the ways in which properties of the world are manifested in images as a function of time and space. In other words, what do we expect the time-varying signal to look like? By examining this question we can begin to identify some of the major issues concerning the measurement of image velocity.