Bogusław Rymut and Tomasz Krzeszowski and Bogdan Kwolek: Full Body Motion Tracking in Monocular Images Using Particle Swarm Optimization; Int. Conf. on Artificial Intelligence and Soft Computing, 2012, Artificial Intelligence and Soft Computing, Lecture Notes in Computer Science, Vol. 7267, Springer Berlin Heidelberg, 2012, pp. 600-607.
The estimation of full body pose in monocular images is a very difficult problem. In 3D-model based motion tracking the challenges arise as at least one-third of degrees of freedom of the human pose that needs to be recovered is nearly unobservable in any given monocular image. In this paper, we deal with high dimensionality of the search space through estimating the pose in a hierarchical manner using Particle Swarm Optimization. Our method fits the projected body parts of an articulated model to detected body parts at color images with support of edge distance transform. The algorithm was evaluated quantitatively through the use of the motion capture data as ground truth.