SEMINARIOS DE DOCTORADO 2005-2006


Doctorado en Ingeniería Informática y de Telecomunicación
Escuela Politécnica Superior, Universidad Autónoma de Madrid

Escuela Politécnica Superior                        

4 de Noviembre de 2005, 12:00

Salón de Grados, Escuela Politécnica Superior, Universidad Autónoma de Madrid

Human Body Model Acquisition and Tracking using Voxel Data

Ivana Mikic

Vala Sciences, Inc.

     
UNISYS    Contribuye a la financiación de este seminario
     

Abstract

In this talk, an integrated system for automatic acquisition of the human body model and motion tracking using input from multiple synchronized video streams will be presented. 3D voxel reconstructions of the human body shape in each frame are computed from the foreground silhouettes. These reconstructions are then used as input to the model acquisition and tracking algorithms. The human body model is described using the twists framework resulting in a non-redundant set of model parameters. Model acquisition starts with a simple body part localization procedure which is then refined using a Bayesian network that imposes human body proportions onto the body part size estimates. The tracker is an extended Kalman filter that estimates model parameters based on the measurements made on the labeled voxel data. A voxel labeling procedure that handles large frame-to-frame displacements is used resulting in the very robust tracking performance. Extensive evaluation shows that the system performs very reliably on sequences that include different types of motion such as walking, sitting, dancing, running and jumping and people of very different body sizes.

paper PDF

Ivana Mikic

Ivana Mikic was born in Belgrade, Yugoslavia, in 1971. She received the B.S. degree in electrical engineering from the University of Belgrade in 1994, the M.S. degree in biomedical engineering from The Ohio State University in 1996, and the Ph.D. in electrical engineering from the University of California at San Diego in 2002. In December 2003, she joined Vala Sciences, as a Senior Scientist. From 1994 to 1996 she was a Graduate Research Assistant at The Ohio State University. From 1996-1997, she was a Software Engineer for Motorola's Information Systems Group. From 1997 to 2002, she was a Graduate Research Assistant at the University of California, San Diego. In the summer of 1999, she was with the Hughes Research Laboratories. In 2002 and 2003, she was a Senior Scientist at Q3DM, Inc. Her research interests include computer vision, machine learning and human-computer interaction.