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