In this embodiment, the position of each pixel in the display image is treated in {TAIL ~ 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 {HEAD ~ the Y axis} 
In this embodiment , the position of each pixel in the display image is treated in { TAIL ~ 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 { HEAD ~ the Y axis }
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