An Automatic Camera Calibration Method with Image Registration Technique

We propose a novel technique of automated camera calibration method to obtain internal camera parameters, which enables us to compensate the distortion of an image taken by a camera with zooming lens. The proposed method is based on image registration. First a calibration pattern is transformed onto the distorted image of the pattern using affine transformation. Then the registration of the two images are performed using a nonlinear optimization with Gauss-Newton method that minimizes residuals of pixel value of two images. Finally the distortion parameters are estimated to minimize residuals that remain after second step. The experimental results show the usefulness of the proposed method.