Issue No. 01 - January (2009 vol. 31)
Radu Horaud , INRIA Grenoble-Rhone-Alpes, Montbonnot Saint-Martin
Matti Niskanen , University of Oulu, Oulu
Guillaume Dewaele , INRIA Grenoble-Rhone-Alpes, Montbonnot Saint-Martin
Edmond Boyer , INRIA Grenoble-Rhone-Alpes, Montbonnot Saint-Martin
We address the problem of human motion tracking by registering a surface to 3-D data. We propose a method that iteratively computes two things: Maximum likelihood estimates for both the kinematic and free-motion parameters of an articulated object, as well as probabilities that the data are assigned either to an object part, or to an outlier cluster. We introduce a new metric between observed points and normals on one side, and a parameterized surface on the other side, the latter being defined as a blending over a set of ellipsoids. We claim that this metric is well suited when one deals with either visual-hull or visual-shape observations. We illustrate the method by tracking human motions using sparse visual-shape data (3-D surface points and normals) gathered from imperfect silhouettes.
Computer vision, Face and gesture recognition
G. Dewaele, R. Horaud, E. Boyer and M. Niskanen, "Human Motion Tracking by Registering an Articulated Surface to 3D Points and Normals," in IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 31, no. , pp. 158-163, 2008.