Rapid and brief communication: Camera calibration with one-dimensional objects moving under gravity

Authors:
Fei Qi;Qihe Li;Yupin Luo;Dongcheng Hu
Affiliations:
Department of Automation, Tsinghua University, Beijing 100084, PR China;Department of Automation, Tsinghua University, Beijing 100084, PR China;Department of Automation, Tsinghua University, Beijing 100084, PR China;Department of Automation, Tsinghua University, Beijing 100084, PR China
Venue:
Pattern Recognition
Year:
2007

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Abstract

Camera calibration using one-dimensional (1D) rigid objects is arresting the attentions of researchers since the easy-to-construct geometrical structure of the apparatuses. In this paper, we extend the motion patterns applicable for calibration with the motion of 1D objects. We show that a 1D object with three or more markers, rotating around one marker which is moving in a plane, provides constraint equations on camera intrinsic parameters. A stick moving under gravity without other forces acting on performs such a motion. Simulated tests show the feasibility and numerical robustness of this method.