{HEAD ~ a controller} adapted to control said display unit so as to reduce a difference between the input image data and the image displayed on the display surface by said display unit, based on a plurality of image data input to said display unit, and {TAIL ~ images} which correspond to the plurality of image data and are acquired by said acquisition unit, 
{ HEAD ~ a controller } adapted to control said display unit so as to reduce a difference between the input image data and the image displayed on the display surface by said display unit , based on a plurality of image data input to said display unit , and { TAIL ~ images } which correspond to the plurality of image data and are acquired by said acquisition unit ,
HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH