A characteristic curve interface is provided allowing an operator to place {HEAD ~ the subject image} on {TAIL ~ the characteristic curve} so that the image processing system tracks the location of the subject image on the curve 
A characteristic curve interface is provided allowing an operator to place { HEAD ~ the subject image } on { TAIL ~ the characteristic curve } so that the image processing system tracks the location of the subject image on the curve
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 TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH