Publications in Scientific Journals:

N. Artner, A. Ion, W. Kropatsch:
"Multi-scale 2D tracking of articulated objects using hierarchical spring systems";
Pattern Recognition, 44 (2010), 4; 800 - 810.

English abstract:
This paper presents a flexible framework to build a target-specific, part-based representation for arbitrary

articulated or rigid objects. The aim is to successfully track the target object in 2D, through multiple scales

and occlusions. This is realized by employing a hierarchical, iterative optimization process on the

proposed representation of structure and appearance. Therefore, each rigid part of an object is described

by a hierarchical spring system represented by an attributed graph pyramid. Hierarchical spring systems

encode the spatial relationships of the features (attributes of the graph pyramid) describing the parts and

enforce them by spring-like behavior during tracking. Articulation points connecting the parts of the

object allow to transfer position information from reliable to ambiguous parts. Tracking is done in an

iterative process by combining the hypotheses of simple trackers with the hypotheses extracted from the

hierarchical spring systems.

Created from the Publication Database of the Vienna University of Technology.