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2008 Technical Reports

Spatiotemporal Stereo via Spatiotemporal Quadric Element (Stequel) Matching

Mikhail Sizintsev and Richard P. Wildes

Technical Report CSE-2008-04

York University

July 11, 2008


Spatiotemporal stereo is concerned with recovery of the three-dimensional structure of a dynamic scene from a temporal sequence of stereo images. Thispaper aims at computing temporally coherent disparity maps without explicit recovery of motion. We make use of a spatiotemporal volume paradigm and consider extracted features called stequels as basic matching primitives. Thestequel matching principle is developed. Extensive algorithmic evaluation withgroundtruth data incorporated in both local and global correspondence paradigmsshows the great benefit of considering stequels as a matching primitive thatnaturally incoprorates local spatial and temporal structure and its advantagesin comparison to alternative ways of enforcing temporal coherence in the stereoestimation procedure.

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