One or more push force vectors are applied to one or more force receiving locations of {TAIL ~ the model} to push the model in an XY plane towards a silhouette of {HEAD ~ the human target} in the observed depth image when portions of the model are shifted away from the silhouette of the human target in the observed depth image 
One or more push force vectors are applied to one or more force receiving locations of { TAIL ~ the model } to push the model in an XY plane towards a silhouette of { HEAD ~ the human target } in the observed depth image when portions of the model are shifted away from the silhouette of the human target in the observed depth image
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH