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