an image data obtaining unit that obtains image data including pixel data corresponding to a plurality of {HEAD ~ pixels} forming {TAIL ~ the image} 
forming
an image data obtaining unit that obtains image data including pixel data corresponding to a plurality of { HEAD ~ pixels } forming { TAIL ~ the image }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL