Horst Possegger

Horst Possegger

E-Mail possegger(at)icg.tugraz.at
Phone +43 316 873-5050
Office Room E3.10 (IE02116)

Short CV

Horst Possegger received his BSc degree in Software Development and Business Management from Graz University of Technology in 2011. Currently, he is a MSc student at the Institute of Computer Vision and Graphics at Graz University of Technology, Austria. His studies are focused on computer vision and law.

Projects

Unsupervised Calibration of Camera Networks and Virtual PTZ Cameras

Pan-Tilt-Zoom (PTZ) cameras are widely used in video surveillance tasks. In particular, they can be used in combination with static cameras to provide high resolution imagery of interesting events in a scene on demand. Nevertheless, PTZ cameras only provide a single trajectory at a time. Hence, engineering algorithms for common computer vision tasks, such as automatic calibration or tracking, for camera networks including PTZ cameras is difficult. Therefore, we implemented a virtual PTZ (vPTZ) camera to simplify the algorithm development for such camera networks. The vPTZ camera is built on a cylindrical panoramic view of the scene and allows to reposition its field of view arbitrarily to provide several trajectories.

The vPTZ camera has been used to develop an unsupervised extrinsic self-calibration method for a network of static cameras and PTZ cameras, solely based on correspondences between tracks of a walking human. Our experimental results show that we can obtain accurate estimates of the extrinsic camera parameters in both, outdoor and indoor scenarios.

A sample implementation of the vPTZ camera, along with the corresponding datasets is available for download at our download section. You may also want to watch the short summary video below.

Publications

2012