In this embodiment, {HEAD ~ the position} of each pixel in {TAIL ~ the display image} is treated in an XY rectangular coordinate system where the upper left corner of the image is set to the origin, the rightward direction is set to the X axis, and the downward direction is set to the Y axis 
In this embodiment , { HEAD ~ the position } of each pixel in { TAIL ~ the display image } is treated in an XY rectangular coordinate system where the upper left corner of the image is set to the origin , the rightward direction is set to the X axis , and the downward direction is set to the Y axis
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH