Date of Award
Doctor of Philosophy
This thesis examines how the visual system solves the motion correspondence problem. In four related experiments, subjects indicated the perceived direction of movement of an element that could, for a single display, be seen to move either to the left or to the right. It was found that thresholds for this direction detection task could be influenced by the presence of an unambiguously moving context. In general, there was a tendency to see the test element move in the same direction as the context. These results indicate that when the visual system solves the motion correspondence problem, interdependencies between the movements of different display elements are taken into account. It is hypothesized that the visual system attempts to minimize the relative velocity of elements, because in the three-dimensional world, the cohesiveness of matter dictates that elements near one another on a moving object should have similar motions. This relative velocity constraint was applied in two related computer simulation models. These models computed the same correspondence matches as computed by the human visual system for many different apparent motion displays. These results indicated that the relative velocity constraint can serve as a plausible natural constraint on solutions to the motion correspondence problem.
Dawson, Michael Robert, "Using Relative Velocity As A Natural Constraint For The Motion Correspondence Problem" (1986). Digitized Theses. 1545.