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Automatic initialization and tracking of human pose is an important task in visual surveillance. We present a part-based approach that incorporates a variety of constraints in a unified framework. These constraints include the kinematic constraints between parts that are physically connected to each other, the occlusion of one part by another and the high correlation between the appearance of certain parts, such as the arms. The location probability distribution of each part is determined by evaluating appropriate likelihood measures. The graphical (non-tree) structure representing the interdependencies between parts is utilized to “connect” such part distributions via nonparametric belief propagation. Methods are also developed to perform this optimization efficiently in the large space of pose configurations
3D/stereo scene analysis, Motion capture, Tracking

A. Mittal, A. Gupta and L. S. Davis, "Constraint Integration for Efficient Multiview Pose Estimation with Self-Occlusions," in IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 30, no. , pp. 493-506, 2007.
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