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The Computation of Optical Flow (1995)
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BibTeX
@MISC{Beauchemin95thecomputation,
author = {S.S. Beauchemin and J.L. Barron},
title = {The Computation of Optical Flow},
year = {1995}
}
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Abstract
Two-dimensional image motion is the projection of the three-dimensional motion of objects, relative to a visual sensor, onto its image plane. Sequences of time-ordered images allow the estimation of projected two-dimensional image motion as either instantaneous image velocities or discrete image displacements. These are usually called the optical flow field or the image velocity field. Provided that optical flow is a reliable approximation to two-dimensional image motion, it may then be used to recover the three-dimensional motion of the visual sensor (to within a scale factor) and the three-dimensional surface structure (shape or relative depth) through assumptions concerning the structure of the optical flow field, the three-dimensional environment and the motion of the sensor. Optical flow may also be used to perform motion detection, object segmentation, time-to-collision and focus of expansion calculations, motion compensated encoding and stereo disparity measurement. We investiga...
Keyphrases
optical flow two-dimensional image motion three-dimensional motion visual sensor optical flow field image velocity field reliable approximation stereo disparity measurement relative depth three-dimensional surface structure instantaneous image velocity image plane discrete image displacement expansion calculation time-ordered image scale factor motion detection three-dimensional environment object segmentation
