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Published Articles >> Table of Contents >> Abstract
Fourth International Conference on 3-D Digital Imaging and Modeling (3DIM '03)
p. 225
Calibration of a Zooming Camera using the Normalized Image of the Absolute Conic
Jean-Yves Guillemaut, University of Surrey, Guildford
Alberto S. Aguado, University of Surrey, Guildford
John Illingworth, University of Surrey, Guildford
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DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/IM.2003.1240254
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| Abstract |
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We present a novel technique for calibrating a zooming
camera based on the invariance properties of the Normalized
Image of the Absolute Conic (NIAC). First, we show
that the camera parameters (independent of the position,
orientation and zooming) are determined uniquely by the
NIAC. Then, we exploit the invariance properties to develop
a stratified calibration method that decouples the calibration
parameters. The method is organized in three steps: i)
computation of the NIAC, ii) computation of the focal length
for each image, iii) computation of the orientation and the
position of the camera. The method only requires two images
of non-coplanar squares at different orientations and
the solution is obtained based on linear minimization that
provides fast and stable convergence properties. A finer solution
can be obtained by taking the solution of the linear
minimisation as a starting point of a non-linear minimization.
Preliminary results for synthetic and real data show
that the method is capable of obtaining accurate results.
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 Additional Information
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Citation:
Jean-Yves Guillemaut, Alberto S. Aguado, John Illingworth,
"Calibration of a Zooming Camera using the Normalized Image of the Absolute Conic,"
3dim,
p. 225,
Fourth International Conference on 3-D Digital Imaging and Modeling (3DIM '03),
2003
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