{HEAD ~ Each row} of {TAIL ~ pixels} may be equal to m and n, and may be 160 
of
{ HEAD ~ Each row } of { TAIL ~ pixels } may be equal to m and n , and may be 160
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH