According to an embodiment, an image display apparatus includes a detection unit, a generation unit, and a display control unit. The detection unit detects areas to be focused in an input image. The generation unit generates a sub image by performing correction for improving visibility on an image of the detected area. The correction includes at least one of size correction for adjusting size of the image of the area, color correction for adjusting color of the image of the area, and distortion correction for transforming the image of the area so as to be an image acquired by viewing the image of the area from the front side. The display control unit displays the generated sub image on a display device together with the input image in a form that accompanies a screen representation representing a correspondence relation with the area.