On-line rectification of sport sequences with moving cameras

Authors:
Jean-Bernard Hayet;Justus Piater
Affiliations:
CIMAT, A.C., Guanajuato, GTO., Mexico;Institut Montefiore, University of Liege, Liege, Belgium
Venue:
MICAI'07 Proceedings of the artificial intelligence 6th Mexican international conference on Advances in artificial intelligence
Year:
2007

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Abstract

This article proposes a global approach to the rectification of sport sequences, to estimate the mapping from the video images to the terrain in the ground plane without using position sensors on the TV camera. Our strategy relies on three complementary techniques: (1) initial homography estimation using line-feature matching, (2) homography estimation with line-feature tracking, and (3) incremental homography estimation through point-feature tracking. Together, they allow continuous homography estimation over time, even during periods where the video does not contain sufficient line features to determine the homography from scratch. We illustrate the complementarity of the 3 techniques on a set of challenging examples.