 calculating, by the motion coordinate calculator, {HEAD ~ a Y axis motion} of {TAIL ~ the pre processed current image} 
of
calculating , by the motion coordinate calculator , { HEAD ~ a Y axis motion } of { TAIL ~ the pre processed current image }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL