Accession Number : ADA183727
Title : Motion Field and Optical Flow: Qualitative Properties.
Descriptive Note : Memorandum rept.,
Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE ARTIFICIAL INTELLIGENCE LAB
Personal Author(s) : Verri,Alessandro ; Poggio,Tomaso
PDF Url : ADA183727
Report Date : Dec 1986
Pagination or Media Count : 34
Abstract : The optical flow, a 2-D field that can be associated with the variation of the image brightness pattern, and the 2-D motion field, the projection on the image plane of the 3-D velocity field of a moving scene, are in general different, unless very special conditions are satified. The optical flow, therefore, is ill suited for computing structure from motion. and for reconstructing the 3-D velocity field, problems that require an accurate estimate of the 2-D motion field. A different use of the optical flow is suggested. Stable field and the 3-D structure of the scene, and they can usually be obtained from the optical flow. The smoothed optical flow and 2-D motion field, interpreted as vector fields tangent to flows of planar dynamical systems, may have the same qualitative properties from the point of view of the theory of structural stability of dynamical systems.
Descriptors : *MOTION, *ARTIFICIAL INTELLIGENCE, *OPTICAL DETECTION, VISUAL PERCEPTION, BRIGHTNESS, DYNAMICS, FLOW, IMAGES, OPTICAL PROPERTIES, PATTERNS, PLANAR STRUCTURES, STABILITY, STRUCTURAL PROPERTIES, TANGENTS, VECTOR ANALYSIS, TWO DIMENSIONAL, THREE DIMENSIONAL
Subject Categories : Cybernetics
Optical Detection and Detectors
Distribution Statement : APPROVED FOR PUBLIC RELEASE