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

Authors

  • Alberto Broggi
  • Alessandra Fascioli
  • Rean Isabella Fedriga
  • Stefano Ghidoni

DOI:

https://doi.org/10.2390/biecoll-icvs2007-51

Keywords:

Automatic calibration, world reconstruction, zebra crossing recognition, distortion evaluation, perspective evaluation, DDC: 004 (Data processing, computer science, computer systems)

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.

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Published

2007-12-31

Issue

Section

The 5th International Conference on Computer Vision Systems