Lens radial distortion calibration using homography of central points

We present a novel method for radial lens distortion calibration which results in high accuracy of compensation. It is based on single image of planar chessboard pattern and uses the extracted distorted grid of points. Due to homographic approach, no special alignment of the camera with regard to the calibration object is required. Undistorted grid is determined from the central points of the image and used to find the radial distortion model using linear least square method (LSM). The model is used for dense compensation by bilinear interpolation or for sparse compensation by Newton iterative scheme.