The image processing system tracks {HEAD ~ the tone densities} calibrated to provide {TAIL ~ enhanced film masking} 
calibrated to provide
The image processing system tracks { HEAD ~ the tone densities } calibrated to provide { TAIL ~ enhanced film masking }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL