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Combining Off- and On-line Calibration of a Digital Camera

2001

Conference Paper

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We introduce a novel outlook on the self­calibration task, by considering images taken by a camera in motion, allowing for zooming and focusing. Apart from the complex relationship between the lens control settings and the intrinsic camera parameters, a prior off­line calibration allows to neglect the setting of focus, and to fix the principal point and aspect ratio throughout distinct views. Thus, the calibration matrix is dependent only on the zoom position. Given a fully calibrated reference view, one has only one parameter to estimate for any other view of the same scene, in order to calibrate it and to be able to perform metric reconstructions. We provide a close­form solution, and validate the reliability of the algorithm with experiments on real images. An important advantage of our method is a reduced ­ to one ­ number of critical camera configurations, associated with it. Moreover, we propose a method for computing the epipolar geometry of two views, taken from different positions and with different (spatial) resolutions; the idea is to take an appropriate third view, that is "easy" to match with the other two.

Author(s): Urbanek, M. and Horaud, R. and Sturm, P.
Journal: In Proceedings of Third International Conference on 3-D Digital Imaging and Modeling
Pages: 99-106
Year: 2001
Month: June
Day: 0

Department(s): Empirical Inference
Bibtex Type: Conference Paper (inproceedings)

Event Name: In Proceedings of Third International Conference on 3-D Digital Imaging and Modeling

Digital: 0
Institution: INRIA Rhone Alpes, Montbonnot, France
Organization: Max-Planck-Gesellschaft
School: Biologische Kybernetik

Links: ZIP

BibTex

@inproceedings{3155,
  title = {Combining Off- and On-line Calibration of a Digital Camera},
  author = {Urbanek, M. and Horaud, R. and Sturm, P.},
  journal = {In Proceedings of Third International Conference on 3-D Digital Imaging and Modeling},
  pages = {99-106},
  organization = {Max-Planck-Gesellschaft},
  institution = {INRIA Rhone Alpes, Montbonnot, France},
  school = {Biologische Kybernetik},
  month = jun,
  year = {2001},
  month_numeric = {6}
}