Methods of Calibration and Correction of Geometrical Distortion and Photosensitivity of Car Rear View Camera

Abstract

The paper considers interactive algorithms for constructing transformations of images obtained from a car rear view fisheye camera to images suitable for helping car driver with reverse movement. Two variants of such algorithms are reviewed, both of them use independent transformations along horizontal and vertical axes instead of methods using camera’s radial symmetry. Described algorithms have two different implementations: one integrated into CATIA CAD system is intended for initial development, debugging and testing, and another one built into camera digital processor for final usage. Also description of additional testing algorithms for rearview camera is provided – algorithm for controlling geometrical transformations and algorithm for controlling image contrast in insufficient ambient light conditions. These algorithms are implemented only as a plugin to CATIA CAD system.