title: The Geometry of Visual Perception: Retinotopic and Non-retinotopic Representations in the Human Visual System.
abstract: Geometry is closely linked to visual perception; yet, very little is known about the geometry of visual processing beyond early retinotopic organization. We present a variety of perceptual phenomena showing that a retinotopic representation is neither sufficient nor necessary to support form perception. We discuss the popular "object files" concept as a candidate for non-retinotopic representations and, based on its shortcomings, suggest future directions for research using local manifold representations. We suggest that these manifolds are created by the emergence of dynamic reference-frames that result from motion segmentation. We also suggest that the metric of these manifolds is based on relative motion vectors.
authors.affiliation: Department of Electrical & Computer Engineering and Center for NeuroEngineering & Cognitive Science, University of Houston, Houston, TX 77204-4005 USA (phone: 713-743-4428; fax: 713-743-4444.
authors.forename: Haluk
authors.initials: H
authors.lastname: Oğmen
authors.forename: Michael H
authors.initials: MH
authors.lastname: Herzog