Langley, K., Fleet, David J. and Atherton, T. J. (1991) An instantaneous frequency-based computation of transparent motion. University of Warwick. Department of Computer Science. (Department of Computer Science research report). (Unpublished)

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Abstract

We extend the principle of phase-based techniques for measuring optical flow and binocular disparity to multiple motion estimation. Using quadrature filter pairs, we estimate phase gradients (instantaneous frequency) from independent bandpass channels, which we apply towards the problem of multiple optic flow analysis. Our approach is similar to that of Shizawa and Mase [23], in which nth-order differential operators are required to compute n simultaneous velocity estimates. The approach presented here is simpler, however, because we require only a set of band-pass filters, the out-puts of which need only be differentiated once. Thus, the present technique requires only first-order filters. Additionally, this theory is also applicable to transparency in stereopsis.

Item Type:	Report
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Science > Computer Science
Library of Congress Subject Headings (LCSH):	Digital video
Series Name:	Department of Computer Science research report
Publisher:	University of Warwick. Department of Computer Science
Official Date:	November 1991
Dates:	Date Event November 1991 Completion
Number:	Number 200
Number of Pages:	18
Identification Number:	CS-RR-200
Institution:	University of Warwick
Theses Department:	Department of Computer Science
Status:	Not Peer Reviewed
Publication Status:	Unpublished
Related URLs:	Organisation
URI:	http://wrap.warwick.ac.uk/id/eprint/60887

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