NDLI: Uniqueness, the minimum norm constraint, and analog networks for optical flow along contours

Content Provider	IEEE Xplore Digital Library
Author	Chhabra, A.K. Grogan, T.A.
Copyright Year	1990
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Cincinnati Univ., OH, USA (Chhabra, A.K.; Grogan, T.A.)
Abstract	E. Hildreth's (1984) method of computing optical flow along contours cannot resolve the aperture problem for a rigidly translating straight line contour. The authors propose an additional constraint, which they call the minimum norm constraint, as a means of resolving the ambiguity for such a contour. The minimum norm constraint tends to drive the velocity estimate towards the direction normal to the contour everywhere along the contour, i.e., it counters the effect of the smoothness constraint. This is in accord with recent psychophysical studies of K. Nakayama and G. Silverman (1988) which have revealed the presence of such a tendency in the human visual system. The authors propose an analog network for computing contour based optical flow in real-time. They illustrate the minimum norm constraint through experiments.<>
Starting Page	80
Ending Page	84
File Size	454504
Page Count	5
File Format	PDF
ISBN	0818620579
DOI	10.1109/ICCV.1990.139499
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1990-12-04
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical computing Image motion analysis Apertures Counting circuits Psychology Humans Visual system Analog computers Computer networks Optical fiber networks
Content Type	Text
Resource Type	Article

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