{HEAD ~ The second integrated frame} is divided by {TAIL ~ the first integrated frame} to yield a range coded pixel intensity image 
{ HEAD ~ The second integrated frame } is divided by { TAIL ~ the first integrated frame } to yield a range coded pixel intensity image
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH