Ankur Agarwal Bill Triggs Recovering 3D Human Pose from Monocular Images. 44-58 2006 28 IEEE Trans. Pattern Anal. Mach. Intell. 1 http://doi.ieeecomputersociety.org/10.1109/TPAMI.2006.21 db/journals/pami/pami28.html#AgarwalT06