The resulting sequence of comparisons is {HEAD ~ a dither coded signal representation} of {TAIL ~ the line} being scanned, which is compensated for nonuniform background illumination of the image field 
of
The resulting sequence of comparisons is { HEAD ~ a dither coded signal representation } of { TAIL ~ the line } being scanned , which is compensated for nonuniform background illumination of the image field
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH