US Patent 7656283 Vehicle recognizing apparatus

A vehicle recognizing apparatus which does not require a sophisticated image processing function of a vehicle on a recognizing side and allows a recognized vehicle to be immediately and accurately recognized by a simple image processing system. A pair of first and second infrared markers on the left and right sides are, respectively, placed at a pair of left and right vehicle components. Furthermore, a third infrared marker is provided to form a virtual triangle which may be easily distinguished by a recognizing system from extraneous infrared light sources.