Publications in Scientific Journals:
N. Artner, A. Ion, W. Kropatsch:
"Multi-scale 2D tracking of articulated objects using hierarchical spring systems";
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.