1. An image display apparatus, comprising: an image-forming device that is arranged in a matrix, driven via a plurality of row and column wirings, and used to form an image; a scan unit that sequentially selects and scans said row wiring; an adjusted image data calculation unit that calculates adjusted image data for decreasing an influence of a voltage drop resulting from at least the resistance component of said row wiring for image data; and a modulator that outputs a modulation signal applied to said column wiring based on said adjusted image data, wherein said adjusted image data calculation unit comprises a discrete adjusted image data calculation unit that sets a plurality of discrete image data reference values for image data and calculates discrete adjusted image data for said image data reference value, and an adjusted image data interpolation unit that interpolates the output of the discrete adjusted image data calculation unit and adjusted image data that corresponds to the size of the image data.