{HEAD ~ The transformed set} of intensity data represents at least one transformed gray scale value and the transformed set of height data represents {TAIL ~ at least one transformed height value} 
{ HEAD ~ The transformed set } of intensity data represents at least one transformed gray scale value and the transformed set of height data represents { TAIL ~ at least one transformed height value }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL