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