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