{HEAD ~ The pickup unit} is provided in a reference vehicle with a headlight and working to pick up an image of {TAIL ~ the rectangular area} ahead of the reference vehicle 
{ HEAD ~ The pickup unit } is provided in a reference vehicle with a headlight and working to pick up an image of { TAIL ~ the rectangular area } ahead of the reference vehicle
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH