In This work we propose a statistical model for detection and tracking of human silhouette and the corresponding 3D skeletal structure in gait sequences. We follow a point distribution model (PDM) approach using a principal component analysis (PCA). The problem of non-linear PCA is partially resolved by applying a different PDM depending of pose estimation; frontal, lateral and diagonal, estimated by Fisher's linear discriminant. Additionally, the fitting is carried out by selecting the closest allowable shape from the training set by means of a nearest neighbor classifier. To improve the performance of the model we develop a human gait analysis to take into account temporal dynamic to track the human body. The incorporation of temporal constraints on the model helps increase the reliability and robustness.
Orrite-Uru??ueta, C., Del Rinc??n, J. M., Herrero-Jaraba, J. E., & Rogez, G. (2004). 2D silhouette and 3D skeletal models for human detection and tracking. In Proceedings - International Conference on Pattern Recognition (Vol. 4, pp. 244–247). https://doi.org/10.1109/ICPR.2004.1333749