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Proceedings Paper

A software for complete calibration of multicamera systems
Author(s): Tomas Svoboda
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Paper Abstract

We present a software for complete metric calibration of synchronized multicamera setups. The minimum is three cameras, but there is no upper limit. The method is fully automatic and a freely moving bright spot is the only calibration object. No camera pre-calibration is required. The software computes complete set of intrinsic camera parameters including the parameters of non-linear distortion as well as external orientation of the cameras in one common coordinate system. The software is written in Matlab, runs in non-interactive mode and produces both textual and intuitive graphical output. It is very robust and may be run with the same set of parameters in different setups. The software is free. We suggest a trick on how to adapt a very ordinary laser pointer to be a useful calibration object. Projections of such calibration object are localized with sub-pixel accuracy. Average reprojection error around 1/5 pixel was reached in well synchronized multicamera setups even for wide-angle lenses with severe non-linear distortion. We show several virtual reality and telepresence applications demonstrating the usefulness of having multicamera setups being fully calibrated.

Paper Details

Date Published: 14 March 2005
PDF: 14 pages
Proc. SPIE 5685, Image and Video Communications and Processing 2005, (14 March 2005); doi: 10.1117/12.594068
Show Author Affiliations
Tomas Svoboda, Czech Technical Univ. (Czech Republic)

Published in SPIE Proceedings Vol. 5685:
Image and Video Communications and Processing 2005
Amir Said; John G. Apostolopoulos, Editor(s)

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