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Authors: Ricardo Galego ; Alexandre Bernardino and José Gaspar

Affiliation: Institute for Systems and Robotics and Instituto Superior Técnico / UTL, Portugal

Keyword(s): Image formation, Vignetting correction, Pan-Tilt cameras, Visual event detection, Surveillance.

Related Ontology Subjects/Areas/Topics: Applications ; Computer Vision, Visualization and Computer Graphics ; Geometry and Modeling ; Image-Based Modeling ; Pattern Recognition ; Software Engineering

Abstract: It is a well know result that the geometry of pan and tilt (perspective) cameras auto-calibrate using just the image information. However, applications based on panoramic background representations must also compensate for radiometric effects due to camera motion. In this paper we propose a methodology for calibrating the radiometric effects inherent in the operation of pan-tilt cameras, with applications to visual surveillance in a cube (mosaicked) visual field representation. The radiometric calibration is based on the estimation of vignetting image distortion using the pan and tilt degrees of freedom instead of color calibrating patterns. Experiments with real images show that radiometric calibration reduce the variance in the background representation allowing for more effective event detection in background-subtraction-based algorithms.

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Paper citation in several formats:
Galego, R., Bernardino, A. and Gaspar, J. (2011). VIGNETTING CORRECTION FOR PAN-TILT SURVEILLANCE CAMERAS. In Proceedings of the International Conference on Computer Vision Theory and Applications (VISIGRAPP 2011) - VISAPP; ISBN 978-989-8425-47-8; ISSN 2184-4321, SciTePress, pages 638-644. DOI: 10.5220/0003374706380644

@conference{visapp11,
author={Ricardo Galego and Alexandre Bernardino and José Gaspar},
title={VIGNETTING CORRECTION FOR PAN-TILT SURVEILLANCE CAMERAS},
booktitle={Proceedings of the International Conference on Computer Vision Theory and Applications (VISIGRAPP 2011) - VISAPP},
year={2011},
pages={638-644},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0003374706380644},
isbn={978-989-8425-47-8},
issn={2184-4321},
}

TY - CONF

JO - Proceedings of the International Conference on Computer Vision Theory and Applications (VISIGRAPP 2011) - VISAPP
TI - VIGNETTING CORRECTION FOR PAN-TILT SURVEILLANCE CAMERAS
SN - 978-989-8425-47-8
IS - 2184-4321
AU - Galego, R.
AU - Bernardino, A.
AU - Gaspar, J.
PY - 2011
SP - 638
EP - 644
DO - 10.5220/0003374706380644
PB - SciTePress

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