Binocular Image Flows: Steps Toward Stereo - Motion Fusion.
Abstract
In decomposing the visual information processing task into several stages, it is the intermediate level which is responsible for the recovery of surface shapes in a scene. It is often described as a set of 'shape from' modules which, acting independently and in parallel, feed a viewer centered '2.5-D sketch' of the visual field. Two of the most commonly studied and closely related modules are shape from stereo and shape from monocular motion. The analyses of visual data by stereo and motion modules have typically been treated as separate, parallel processes which both feed a common viewer-centered 2.5-D sketch of the scene. When acting separately, stereo and motion analyses are subject to certain inherent difficulties: (1) stereo must resolve a combinatorial correspondence problem and is further complicated by the presence of occluding boundaries; (2) motion analysis involves the solution of nonlinear equations and yields a 3-D interpretation specified up to an undetermined scale factor. This report describes a new module which unifies stereo and motion analysis in a manner in which each helps to overcome the other's shortcomings. One important result is a correlation between relative image flow (i.e., binocular difference flow) and stereo disparity; it points to the importance of the ratio delta/delta, rate of change of disparity delta to disparity delta, and its possible role in establishing stereo correspondence. Our formulation may reflect the human perception channel probed by Reagan and Beverley (1979).
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1985
- Accession Number
- ADA158089
Entities
People
- A. M. Waxman
- J. H. Duncan
Organizations
- University of Maryland