Every time {TAIL ~ the count value} of the white dot counter 96 reaches {HEAD ~ the predetermined value}, it is determined that an image block is spaced apart from the preceding one 
Every time { TAIL ~ the count value } of the white dot counter 96 reaches { HEAD ~ the predetermined value } , it is determined that an image block is spaced apart from the preceding one
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH