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Proceedings Paper

Perspective invariant movie analysis for depth recovery
Author(s): Lionel Moisan
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Paper Abstract

Processing entire movies and taking advantage of the interframe redundancy is the key of shape-from-motion analysis. Thus, recovering the depth of a fixed scene from an image sequence can be viewed as a movie processing problem: how to focus the redundant depth information of a noisy image sequence into a perfect depth-coherent movie? We present a natural set of axioms in agreement with the depth recovery, in the simple case of a straight movement of the camera parallel to the focal plane. According to these axioms, we show that there is a unique depth-coherent way of processing movies, described by a nonlinear partial differential equation. The corresponding multiscale analysis has the property of smoothing the motion field of a movie, leading naturally to a perfect motion field compatible with a depth interpretation. Moreover, in the case of an ideal movie, i.e. coherent with the observation of a fixed 3D scene, this analysis can be viewed as a simple filtering of the camera movement preserving the depth interpretation given by the movie, and is thereby perspective invariant. Last, we study a numerical scheme, compatible with the theoretical axioms, and produce some experiments on synthetic noisy movies.

Paper Details

Date Published: 1 September 1995
PDF: 11 pages
Proc. SPIE 2567, Investigative and Trial Image Processing, (1 September 1995); doi: 10.1117/12.218489
Show Author Affiliations
Lionel Moisan, Univ. Paris-Dauphine (France)

Published in SPIE Proceedings Vol. 2567:
Investigative and Trial Image Processing
Leonid I. Rudin; Simon K. Bramble, Editor(s)

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