Patent ID: 8326046
Filing Date: 2012-12-04
Classification: G06K,G06T

Abstract:
1. A method for determining a measure of similarity between an image X and an image Y, having the same number of rows and columns of pixels, the method comprising: (a1) applying a one level multiresolution decomposition to the image X, producing an approximation subband containing main content of the image X and detail subbands containing fine edges of the image X; (b1) applying said one level multiresolution decomposition to the image Y, producing an approximation subband containing main content of the image Y and detail subbands containing fine edges of the image Y; (c1) determining an approximation similarity measure, characterizing similarity between the main content of the image X and the main content of the image Y, by processing the approximation subband of the image X and the approximation subband of the image Y; (d1) aggregating the detail subbands of the image X, producing an aggregate for the image X; (e1) aggregating the detail subbands of the image Y, producing an aggregate for the image Y; (f1) determining an edge similarity measure, characterizing similarity between the fine edges of the image X and the fine edges of the image Y, by processing the aggregate for the image X and the aggregate for the image Y; and (g1) determining a Structural Similarity (SSIM) score as the measure of similarity between the image X and the image Y by processing the approximation similarity measure and the edge similarity measure.