In some embodiments, the original body part index of a synthesized pixel may be nil if the synthesized pixel does not correspond to {HEAD ~ a body part} of {TAIL ~ the target}  
of
In some embodiments , the original body part index of a synthesized pixel may be nil if the synthesized pixel does not correspond to { HEAD ~ a body part } of { TAIL ~ the target }
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 OTH