An image display apparatus displaying an image on a panel having pixels each including a plurality of subpixels of different colors includes an interpolation operator interpolating consecutive sampling values of input color data supplied to drive the panel to correct phases of the input color data on the basis of positions of the subpixels in each pixel and output pieces of color data; a correction unit correcting signal levels of the output color data on the basis of associated predetermined gains; an angle information calculator calculating, for each pixel or subpixel, a direction of a viewer of the panel on the basis of a position of the viewer relative to the panel; and a gain setting unit setting, for the pieces of input color data, the gains so as to correct luminance levels of the subpixels, which change depending on the viewing direction, on the basis of the calculation result.