Revised definition of optical flow: integration of radiometric andgeometric cues for dynamic scene analysis
Negahdaripour, S.
Dept. of Electr. & Comput. Eng., Miami Univ., Coral Gables, FL;
This paper appears in: Pattern Analysis and Machine Intelligence, IEEE Transactions on
Publication Date: Sep 1998
Volume: 20,
Issue: 9
On page(s): 961-979
ISSN: 0162-8828
References Cited: 36
CODEN: ITPIDJ
INSPEC Accession Number: 6037190
Digital Object Identifier: 10.1109/34.713362
Current Version Published: 2002-08-06
Abstract
Optical flow has been commonly defined as the apparent motion of
image brightness patterns in an image sequence. In this paper, we
propose a revised definition to overcome shortcomings in interpreting
optical flow merely as a geometric transformation field. The new
definition is a complete representation of geometric and radiometric
variations in dynamic imagery. We argue that this is more consistent
with the common interpretation of optical flow induced by various scene
events. This leads to a general framework for the investigation of
problems in dynamic scene analysis, based on the integration and unified
treatment of both geometric and radiometric cues in time-varying
imagery. We discuss selected models, including the generalized dynamic
image model, for the estimation of optical flow. We show how various 3D
scene information are encoded in, and thus may be extracted from, the
geometric and radiometric components of optical flow. We provide
selected examples based on experiments with real images
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