1. A method for displaying digital images on a display device comprising: (a) obtaining an input image set including at least one input image; (b) processing said input image set to generate an output image set including a plurality of output images, said processing including: (i) generating a first subset of said output images by applying a first image-processing transformation to input images from said input image set, said image-processing transformation causing a luminance distortion to at least one region of said output image relative to the corresponding region of the input image, and (ii) generating a second subset of said output images by applying a second image processing transformation to input images from said input image set, said second image processing transformation being different from said first image processing transformation; and (c) displaying said output image set in a sequence on the display device at a frame rate in excess of five frames per second, wherein said first and second image-processing transformations and said sequence are chosen such that a time-integrated average luminance in each region of the display over successive frames approximates to the luminance distribution of a corresponding region of said input image set.