1. A computerized method of image processing to find salient pixels in a given image, the method comprising: providing a dissimilarity measure between patches of said image, said dissimilarity measure combining an appearance component between respective patches and a distance component based on a distance between said respective patches; finding a first patch of said image; comparing said first patch with other patches at different distances from said first patch using said dissimilarity measure, thereby to obtain a score; applying to each pixel of said first patch said obtained score; continuing said comparing and scoring with additional patches of said image; and outputting a saliency map indicating pixels and their corresponding saliency scores.