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B-Spline Active Contour with Handling of Topology Changes for Fast Video Segmentation

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Abstract

This paper deals with video segmentation for MPEG-4 and MPEG-7 applications. Region-based active contour is a powerful technique for segmentation. However most of these methods are implemented using level sets. Although level-set methods provide accurate segmentation, they suffer from large computational cost. We propose to use a regular B-spline parametric method to provide a fast and accurate segmentation. Our B-spline interpolation is based on a fixed number of points depending on the level of the desired details. Through this spatial multiresolution approach, the computational cost of the segmentation is reduced. We introduce a length penalty. This results in improving both smoothness and accuracy. Then we show some experiments on real-video sequences.

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Correspondence to Frederic Precioso.

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Keywords

  • video segmentation
  • region-based active contour
  • parametric active contour
  • B-spline
  • interpolation