Related Work
* Bregler & Malik: image motion, single hypothesis,
full-body required multiple cameras, scaled ortho.
* Ju, Black, Yacoob: cardboard person model,
* Deutscher et al: Condensation, edge cues,
* Cham& Rehg: known templates, 2D (SPM), particle
* Wachter & Nagel: nicely combines motion and edges,
single hypothesis (Kalman filter).
* Leventon & Freeman: assumes 2D tracking,
probabilistic formulation, learned temporal model