Let D represent the input density to {HEAD ~ the characteristic curve LUT}, and {TAIL ~ E} represent the characteristic curve output 
Let D represent the input density to { HEAD ~ the characteristic curve LUT } , and { TAIL ~ E } represent the characteristic curve output
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH