{TAIL ~ The system} further includes a programmed computer that determines whether each pixel is a constant area pixel or {HEAD ~ an edge area pixel} 
{ TAIL ~ The system } further includes a programmed computer that determines whether each pixel is a constant area pixel or { HEAD ~ an edge area pixel }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD