Prior to image processing, each point in {HEAD ~ the digitized 3D and gray scale data} is transformed based upon {TAIL ~ the digital values} of the gray scale and height values 
Prior to image processing , each point in { HEAD ~ the digitized 3D and gray scale data } is transformed based upon { TAIL ~ the digital values } of the gray scale and height values
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH