Camera Calibration Based on New Lens Distortion Model

In the classic two-step technique based camera calibration methods, pinhole parameters and lens distortion parameters are estimated together. The calibration results are affected by the coupling of these parameters. Image pixel coordinate expressed lens distortion models are derived, which are modifications to existing image physical coordinate expressed lens distortion models and reduce the coupling between linear parameters and distortion parameters. Camera calibration method is proposed based on the new distortion models and used to calibrate binocular vision cameras with a three-dimensional target. The experiment results show that compared with traditional camera calibration method, the proposed method is feasible and can efficiently improve calibration accuracy.