1. A method for determining a measure of quality for an image Y, characterizing a similarity between the image Y and a reference image X having same resolution, the method comprising: (a) determining a number of levels of decomposition, N, to be applied to the image X and the image Y; (b) applying an N level multiresolution decomposition, comprising levels 1 , 2 ,. .. i, i+1,. .. N, to the image X and the image Y, producing respective approximation subbands containing main contents of the image X and image Y, and respective detail subbands containing edges of the image X and image Y; (c) applying an image quality metric (IQM) to said respective approximation subbands of the image X and the image Y to produce an approximation quality measure, characterizing similarity between the main contents of the image X and the image Y; (d) processing the respective detail subbands of the image X and the image Y to produce respective edge maps for the image X and the image Y, characterizing edges of the image X and the image Y respectively; (e) applying the IQM to the respective edge maps to produce an edge quality measure, characterizing similarity between the edges of the image X and the image Y; and (f) processing the approximation quality measure and the edge quality measure to determine the measure of quality.