TechRxiv
Sensors_Journal_Final.pdf (3.45 MB)
Download file

Camera Calibration Using Catenary

Download (3.45 MB)
preprint
posted on 19.10.2021, 00:44 by Okay ArıkOkay Arık, Seniha Esen Yuksel
In this work, we introduce a novel calibration technique based on a hanging chain curve replacing the checkerboard-based methods. It is a known physical phenomenon that a hanging chain or a flexible rope under gravity can be modeled by a special curve called catenary. Therefore, instead of the commonly-used planar calibrator, we propose using multiple shots of a catenary-shaped chain for calibration. This approach can solve the out-of-focus problem which is faced in checkerboard calibration methods when the size of the board is not large enough. Although enlarging a planar calibrator increases the manufacturing time and cost, a simple label chain can create large planar areas as precise as a rigid checkerboard, is easily foldable and transportable. We compare the results of our proposed approach against the widely used checkerboardbased calibration as well as the state-of-the-art calibration methods and show that catenary-based calibration is much more accurate than checkerboard-based calibration by a very large margin and is also very competitive among the other approaches.

History

Email Address of Submitting Author

okayarik@hacettepe.edu.tr

ORCID of Submitting Author

0000-0001-5163-0035

Submitting Author's Institution

Hacettepe University, Department of Electrical and Electronics Engineering

Submitting Author's Country

Turkey

Usage metrics

Read the peer-reviewed publication

Licence

Exports