The modified constant and edge area pixels are stored as {TAIL ~ a modified image} for {HEAD ~ output processing} 
The modified constant and edge area pixels are stored as { TAIL ~ a modified image } for { HEAD ~ output processing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD