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Automatic Calibration of a Urban Video Surveillance System through the Observation of Zebra Crossings

Broggi, Alberto ; Fascioli, Alessandra ; Fedriga, Rean Isabella ; Ghidoni, Stefano

The 5th International Conference on Computer Vision Systems, 2007
Bielefeld, 21. - 24. März 2007


Abstract:
In this paper, a method for automatic calibration of a camera stereo pair through the observation of zebra crossing signs is described. It is based on the well-known consideration that it is possible to obtain information about lens distortion and camera orientation by observing how a known pattern appears in the image; moreover, a major advantage of this system is that it does not require any ad-hoc calibration pattern, because it exploits the zebra crossing signs, a pattern usually present in images used for monitoring pedestrians while crossing a road. To achieve this goal, well-known techniques for removing lens distortion and perspective effect are combined with new methods for locating calibration points on the available pattern, and, finally, for evaluating the camera position.


Schlagwörter: Automatic calibration, world reconstruction, zebra crossing recognition, distortion evaluation, perspective evaluation
Beteiligte Einrichtung: Technische Fakultät, Arbeitsgruppen der Informatik
DDC-Sachgruppe: Datenverarbeitung, Informatik

Zitat-Vorschlag:
Broggi, Alberto ; Fascioli, Alessandra ; Fedriga, Rean Isabella ; Ghidoni, Stefano  (2007)  Automatic Calibration of a Urban Video Surveillance System through the Observation of Zebra Crossings. The 5th International Conference on Computer Vision Systems, 2007


URL: http://biecoll.ub.uni-bielefeld.de/volltexte/2007/13



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