Motion compensated film restoration |
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Authors: | O Buisson S Boukir B Besserer |
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Affiliation: | (1) Institut National de l'Audiovisuel, 4 Av. de l'Europe, 94366 Bry sur Marne Cedex, France , FR;(2) Laboratoire L3i, Université de La Rochelle, Avenue Michel Crépeau, 17042 La Rochelle cedex 1, France; e-mail: sboukir@univ-lr.fr, Tel.: +33-5-46458284, Fax: +33-5-46458242 , FR |
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Abstract: | Motion picture films are susceptible to local degradations such as dust spots. Other deteriorations are global such as intensity
and spatial jitter. It is obvious that motion needs to be compensated for before the detection/correction of such local and
dynamic defects. Therefore, we propose a hierarchical motion estimation method ideally suited for high resolution film sequences.
This recursive block-based motion estimator relies on an adaptive search strategy and Radon projections to improve processing
speed. The localization of dust particles then becomes straightforward. Thus, it is achieved by simple inter-frame differences
between the current image and motion compensated successive and preceding frames. However, the detection of spatial and intensity
jitter requires a specific process taking advantage of the high temporal correlation in the image sequence. In this paper,
we present our motion compensation-based algorithms for removing dust spots, spatial and intensity jitter in degraded motion
pictures. Experimental results are presented showing the usefulness of our motion estimator for film restoration at reasonable
computational costs.
Received: 9 July 2000 / Accepted: 13 January 2002
Correspondence to:S. Boukir |
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Keywords: | : Motion estimation – Block matching – Motion picture restoration – Dust spot removal – Spatial and intensity jitter removal |
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