'Generic-view principle' for three-dimensional-motion perception: optics and inverse optics of a moving straight bar.
The generic-view principle (GVP) states that given a 2-D image the visual system interprets it as a generic view of a 3-D scene when possible. The GVP was applied to 3-D-motion perception to show how the visual system decomposes retinal image motion into three components of 3-D motion: stretch/shrinkage, rotation, and translation. First, the optical process of retinal image motion was analyzed, and predictions were made based on the GVP in the inverse-optical process. Then experiments were conducted in which the subject judged perception of stretch/shrinkage, rotation in depth, and translation in depth for a moving bar stimulus. Retinal-image parameters-2-D stretch/shrinkage, 2-D rotation, and 2-D translation-were manipulated categorically and exhaustively. The results were highly consistent with the predictions. The GVP seems to offer a broad and general framework for understanding the ambiguity-solving process in motion perception. Its relationship to other constraints such as that of rigidity is discussed.
Kitazaki
M
M
Department of Life Sciences/Psychology, University of Tokyo, Japan. saki@real.c.u-tokyo.ac.jp
Shimojo
S
S
D001499:Bayes Theorem; D003463:Cues; D003867:Depth Perception; D005260:Female; D005863:Gestalt Theory; D006801:Humans; D008297:Male; D008606:Mental Processes; D008960:Models, Psychological; D009039:Motion Perception; D055095:Optics and Photonics; D012399:Rotation