Rear view device for a motor vehicle

The system has a computer for processing images obtained by electronic camera assemblies (1, 1'). Digital images produced by the system are processed in the computer for calculation of additional information for a car driver. Image repetition rate of an optical sensor is adapted to the computer capacitance of the computer so that the image information incorporates safety-relevant image data and the computer evaluates the image data based on the computer capacitance on hazard potential. The image repetition rate is calculated with 30 images per second.