Distributed Localization of Networked Cameras

Stanislav Funiak, Carlos Ernesto Guestrin, Rahul Sukthankar, and Mark Paskin
Fifth International Conference on Information Processing in Sensor Networks (IPSN'06), April, 2006, pp. 34 - 42.


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Abstract
Camera networks are perhaps the most common type of sensor network and are deployed in a variety of real-world applications including surveillance, intelligent environments and scientific remote monitoring. A key problem in deploying a network of cameras is calibration, i.e., determining the location and orientation of each sensor so that observations in an image can be mapped to locations in the real world. This paper proposes a fully distributed approach for camera network calibration. The cameras collaborate to track an object that moves through the environment and reason probabilistically about which camera poses are consistent with the observed images. This reasoning employs sophisticated techniques for handling the difficult nonlinearities imposed by projective transformations, as well as the dense correlations that arise between distant cameras. Our method requires minimal overlap of the cameras' fields of view and makes very few assumptions about the motion of the object. In contrast to existing approaches, which are centralized, our distributed algorithm scales easily to very large camera networks. We evaluate the system on a real camera network with 25 nodes as well as simulated camera networks of up to 50 cameras and demonstrate that our approach performs well even when communication is lossy.

Keywords
Sensor Networks, Graphical Models

Notes
Sponsor: Intel Research Scholar Program
Grant ID: CNS-0428738 NSF ITR
Number of pages: 9

Text Reference
Stanislav Funiak, Carlos Ernesto Guestrin, Rahul Sukthankar, and Mark Paskin, "Distributed Localization of Networked Cameras," Fifth International Conference on Information Processing in Sensor Networks (IPSN'06), April, 2006, pp. 34 - 42.

BibTeX Reference
@inproceedings{Funiak_2006_5609,
   author = "Stanislav Funiak and Carlos Ernesto Guestrin and Rahul Sukthankar and Mark Paskin",
   title = "Distributed Localization of Networked Cameras",
   booktitle = "Fifth International Conference on Information Processing in Sensor Networks (IPSN'06)",
   pages = "34 - 42",
   month = "April",
   year = "2006",
}