However, in STEP 8101, as an image of a multivalue image , the image is stored into the DRAM as {TAIL ~ an image} of {HEAD ~ 64 lines} or more in the sub scanning direction for the purpose of detecting dust 
However , in STEP 8101 , as an image of a multivalue image , the image is stored into the DRAM as { TAIL ~ an image } of { HEAD ~ 64 lines } or more in the sub scanning direction for the purpose of detecting dust
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH