wherein said controller controls said display unit to display the image after correcting {HEAD ~ the input image data}, based on {TAIL ~ the estimated ratio} 
based on
wherein said controller controls said display unit to display the image after correcting { HEAD ~ the input image data } , based on { TAIL ~ the estimated ratio }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL