Drift-free tracking of rigid and articulated objects

Model-based 3D tracker estimate the position, rotation, and joint angles of a given model from video data of one or multiple cameras. They often rely on image features that are tracked over time but the accumulation of small errors results in a drift away from the target object. In this work, we address the drift problem for the challenging task of human motion capture and tracking in the presence of multiple moving objects where the error accumulation becomes even more problematic due to occlusions. To this end, we propose an analysis-by-synthesis framework for articulated models. It combines the complementary concepts of patchbased and region-based matching to track both structured and homogeneous body parts. The performance of our method is demonstrated for rigid bodies, body parts, and full human bodies where the sequences contain fast movements, self-occlusions, multiple moving objects, and clutter. We also provide a quantitative error analysis and comparison with other model-bas...

• Type: Conference
• Year: 2008
• Where: CVPR
• Authors: Juergen Gall, Bodo Rosenhahn, Hans-Peter Seidel
• Keywords: Computer Vision, CVPR 2008, Error Accumulation, Homogeneous Body Parts, Model-based 3d Tracker, Multiple Moving Objects, Quantitative Error Analysis