{HEAD ~ binary data producing circuit means} for converting {TAIL ~ said multi gradation image data} into binary image data; and 
for converting
{ HEAD ~ binary data producing circuit means } for converting { TAIL ~ said multi gradation image data } into binary image data ; and
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH