Correction of the Asymmetrical Projection for Accurate Camera Calibration Using Co-Planar Circular Feature

Abstract:

Circular features are one of the most widely used shapes for camera calibration, due to several advantages: easy to make and recognize, not sensitive to image noise, symmetry, analytic formulation is simple. However, perspective projection is generally not a shape preserving transformation. A circle often mapped as an ellipse on the image plane when the feature and the image plane are not parallel to each other, as a result, the center of the circle shift from the center of the ellipse. In this paper we present a simple and robust algorithm to compensate this bias before camera calibration. Experimental results show the algorithm is important and convenient.

• Periodical: Applied Mechanics and Materials (Volumes 397-400)
• Pages: 1016-1020
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.397-400.1016
• Online since: September 2013
• Authors: Xiang Lin Meng, Wan Tao He, Xiang Qian Che, Can Zhao
• Keywords: Asymmetrical Projection, Camera Calibration

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