{TAIL ~ A defocusing mechanism} defocuses the first color component signal based on {HEAD ~ the filtered first color component signal} 
{ TAIL ~ A defocusing mechanism } defocuses the first color component signal based on { HEAD ~ the filtered first color component signal }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD