An Image Transformation Method that Realizes a Field of View of 180 Degrees without Compromising Distance Perception for a Camera-Based Rear Vision System for Merging and Changing Lanes

摘要

This paper describes a new image transformation method for rear view systems intended for watching rearrntraffic before and during merging and lane changing maneuvers. In order to enable the driver to gain a complete overviewrnof the rear situation without blindspots and to make correct distance judgments in one glance, we developed a novelrntransformation of a fisheye image to a projection model that combines a field of view of 180 degrees with near absence ofrndistortions (when driving on a straight road) and with a magnification similar to curved door mirrors (in the center of thernimage and when viewed on an 9-inch display). An experiment using our prototype showed that drivers can judge distancernto cars in the rear as accurately as with conventional door mirrors.