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, said second subset being distinct from said first subset; 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, said sequence including images from said first subset interspaced with images from said second subset, 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.