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Radiometric Calibration of a Helmholtz Stereo Rig

Zsolt Jankó, Ondrej Drbohlav, Radim Sára
CVPR 2004 pp. 166-171
doi:10.1109/CVPR.2004.198 /cvpr/2004/janko2004cvpr-radiometric/

Abstract

Helmholtz stereopsis guarantees unbiasedness by BRDF of the search for inter-image correspondences. In a practical setup, calibrated pixel sensitivity and corrected light anisotropy are required for the method to work well. In this paper a simple method for joint light-camera radiometric calibration is proposed. Such calibration is shown to be an ill-posed numerical problem. In the worst case of a single image pair, it can be regularized along epipolar lines only. The calibration problem becomes regularizable everywhere in the case of more pairs and cameras in a general position. A general, simple and fast calibration procedure is proposed that includes a regularizer for the single-pair case. It is shown in a ground-truth experiment that the accuracy of reconstructed surface normals improves by an order of magnitude after radiometric calibration.

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Text

Jankó et al. "Radiometric Calibration of a Helmholtz Stereo Rig." IEEE/CVF Conference on Computer Vision and Pattern Recognition, 2004. doi:10.1109/CVPR.2004.198

Markdown

[Jankó et al. "Radiometric Calibration of a Helmholtz Stereo Rig." IEEE/CVF Conference on Computer Vision and Pattern Recognition, 2004.](https://mlanthology.org/cvpr/2004/janko2004cvpr-radiometric/) doi:10.1109/CVPR.2004.198

BibTeX

@inproceedings{janko2004cvpr-radiometric,
  title     = {{Radiometric Calibration of a Helmholtz Stereo Rig}},
  author    = {Jankó, Zsolt and Drbohlav, Ondrej and Sára, Radim},
  booktitle = {IEEE/CVF Conference on Computer Vision and Pattern Recognition},
  year      = {2004},
  pages     = {166-171},
  doi       = {10.1109/CVPR.2004.198},
  url       = {https://mlanthology.org/cvpr/2004/janko2004cvpr-radiometric/}
}