Patent ID: 7307643

Claim:
An image display control unit which displays an original image on a display screen, said control unit comprising: a screen size information obtaining section obtaining information on a display size on the whole of said display screen; an image information obtaining section obtaining information on vertical and horizontal sizes of said image; an arithmetic section calculating an image magnification ratio so that at least one of said vertical and horizontal sizes of said image substantially conforms with at least one of vertical and horizontal display sizes on the whole of said display screen; a first storing section which stores therein (i) the image magnification ratio calculated by said arithmetic section, (ii) display position information, which is the location of a part of the original image, which part is shown on the display screen, in the original image and (iii) the original image, in association with one another; and a display control section displaying said part of the original image on said display screen at the image magnification ratio which has been calculated by said arithmetic section after obtaining, if previously stored, the display position information and the image magnification ratio from said first storing section and, if not previously stored, displaying said part of the original image on said display screen without using the display position information and the image magnification ratio from said first storing section.