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