IMAGE DISPLAY CONTROL UNIT, IMAGE DISPLAY CONTROL METHOD, IMAGE DISPLAYING APPARATUS, AND IMAGE DISPLAY CONTROL PROGRAM RECORDED COMPUTER-READABLE RECORDING MEDIUM

The present invention relates to an image display control unit comprising a screen size information obtaining section, an image information obtaining section for obtaining information on vertical and horizontal sizes of an image, an arithmetic section for calculating an image magnification ratio so that at least one of the vertical and horizontal sizes of the image substantially conforms with at least one of vertical and horizontal display-possible sizes of a display screen, and a display control section for displaying the image at the magnification ratio calculated in the arithmetic section on the display screen. With this arrangement, in displaying an image on a display screen, the image can be displayed automatically at the optimal magnification ratio on the display screen. Accordingly, the wasteful use of the display screen is avoidable, and the image appears on the display screen in an easy-to-see condition.