 calculating, by the motion coordinate calculator, {TAIL ~ an X axis motion} of {HEAD ~ the pre processed current image} 
calculating , by the motion coordinate calculator , { TAIL ~ an X axis motion } of { HEAD ~ the pre processed current image }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD