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