Abstract
We present a new robust method to determine the distortion function of camera systems suffering from radial lens distortion. It is based on single images and uses the distorted positions of collinear points. Neither information about the intrinsic camera parameters nor 3D-pointcorrespondences are required. The algorithm works without user interaction. The actual radial lens distortion of the most wide-angle and low-cost camera systems fits the used distortion model with two distortion coefficients sufficiently. The algorithm iteratively determines the distortion coefficients and the unknown co-ordinates of the principal point which is assumed to be identical with the symmetry point of the radial distortion. The results of experimental measurements of two different camera systems are presented and discussed.
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