The stationarity is preferably characterized by {HEAD ~ statistical measures} of orientation stationarity, scale stationarity, and {TAIL ~ category distribution stationarity} 
of
The stationarity is preferably characterized by { HEAD ~ statistical measures } of orientation stationarity , scale stationarity , and { TAIL ~ category distribution stationarity }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL