 replacing, by the motion coordinate calculator, {HEAD ~ the reference image} previously set in {TAIL ~ the X channel reference unit} with 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 
previously set in
replacing , by the motion coordinate calculator , { HEAD ~ the reference image } previously set in { TAIL ~ the X channel reference unit } with 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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL 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 OTH OTH OTH OTH OTH OTH OTH