loading page

Camera Calibration Using Catenary
  • Okay Arık ,
  • Seniha Esen Yuksel
Okay Arık
Hacettepe University

Corresponding Author:[email protected]

Author Profile
Seniha Esen Yuksel
Author Profile


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.
15 Mar 2022Published in IEEE Sensors Journal volume 22 issue 6 on pages 5962-5968. 10.1109/JSEN.2022.3150424