Calibration of lens distortion for super-wide-angle stereo vision

This paper describes a novel calibration method for stereo cameras equipped with super-wide-angle low-distortion lenses. Radial distortion properties, which are difficult for polynomial distortion models to fit, are a common property of such lenses; this in turn affects camera parameter estimation, making more flexible models desirable. Therefore we employ a B-spline distortion model to properly fit radial distortion properties. Effectiveness of the model is characterized through experimental curve fitting to distortion layout data, camera calibration with regular lenses, and evaluation of 3D reconstruction.