Autonomous cars combine a variety of sensors to perceive their surroundings, which enable them to be driver-less. There are three main groups of sensor systems: LiDAR (light detection & ranging), RADAR sensing technology and cameras.
These sensors must provide a real time picture of the 3D environment of the vehicle.
Video images provide most of the details for the human driver but are also suitable as an input parameter for highly automated driving. Rear and 360° cameras support the driver with a better representation of the environment outside the vehicle.