1P1-C08 Camera Calibration with Super-Wide-Angle and Low-Distortion Lens Using Higher Degree Polynomial Model(Vision System for Mobile Robot)

Abstract

— To correct radial distortion of camera lenses, fitting of polynomial model to the distortion is commonly done. Although approximation of radial distortion using low degree polynomial model is sufficient for simple optical structure lens, some kinds of super-wide-angle and low-distortion lens which have complex optical structure cannot be approximated sufficiently by low degree polynomial model. This paper describes the camera calibration method for such lenses using higher degree polynomial model. First, the application of the model to distortion design of super-wide-angle and low-distortion lens is provided. Second, the experiment on calibration of the real lens with the model is presented. As a result, more accurate fitting to radial distortion is done by using higher degree polynomial model.