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Probabilistic detection and tracking of motion discontinuities

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2 Author(s)
Black, M.J. ; Xerox Palo Alto Res. Center, CA, USA ; Fleet, D.J.

We propose a Bayesian framework for representing and recognizing local image motion in terms of two primitive models: translation and motion discontinuity. Motion discontinuities are represented using a nonlinear generative model that explicitly encodes the orientation of the boundary, the velocities on either side, the motion of the occluding edge over time, and the appearance/disappearance of pixels at the boundary. We represent the posterior distribution over the model parameters given the image data using discrete samples. This distribution is propagated over time using the Condensation algorithm. To efficiently represent such a high-dimensional space we initialize samples using the responses of a low-level motion discontinuity detector

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Computer Vision, 1999. The Proceedings of the Seventh IEEE International Conference on  (Volume:1 )

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