Either linear or non linear transformations are utilized, based on the match between 3D and gray values, and other conditions which determine {HEAD ~ the confidence level} of {TAIL ~ the information} 
of
Either linear or non linear transformations are utilized , based on the match between 3D and gray values , and other conditions which determine { HEAD ~ the confidence level } of { TAIL ~ the information }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL