In some embodiments, synthesized pixels that do not correspond to {HEAD ~ a body part} may be given a different type of {TAIL ~ index} 
In some embodiments , synthesized pixels that do not correspond to { HEAD ~ a body part } may be given a different type of { TAIL ~ index }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL