The Volvo Blind Spot Information System (BLIS). A tiny 25 fps camera, a vehicle recognition program and a telltale yellow warning light. Mix and serve.
‘A digital camera is installed on each door mirror. This small camera captures 25 images per second, and by comparing each frame taken, the system is able to recognise that a vehicle is within the BLIS zone…When another vehicle (motorcycle, car or truck) enters this zone – an area of 9.5 metres by 3.0 metres – a yellow warning light comes on beside the appropriate door mirror in the driver’s peripheral view.’