Edward H. Adelson , RCA David Sarnoff Research Center, Princeton, NJ 08540. In a new illusion, a square wave grating, missing its fundamental, moves rightward in 90 deg jumps. It appears to move leftward . Correspondence theories of motion perception, in which features are matched from frame to frame, predict that rightward motion will be seen.
Models based on linear spatio-temporal filtering can help explain many phenomena in apparent motion.
In another new illusion to be described, the sawtooth motion of random noise leads to the perception of progressive motion in one direction. Even though the stimulus as a whole gets nowhere, the high SF's are actually moving continuously in one direction.