 replacing, by the motion coordinate calculator, the reference image previously set in {HEAD ~ the X channel reference unit} with {TAIL ~ the pre processed current central image} when it is determined at the step that the X axis motion vector has a value other than zero 
replacing , by the motion coordinate calculator , the reference image previously set in { HEAD ~ the X channel reference unit } with { TAIL ~ the pre processed current central image } when it is determined at the step that the X axis motion vector has a value other than zero
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH