Patent ID: 9031134
Filing Date: 2015-05-12
Classification: H04N

Abstract:
1. A method for evaluating whether a test image is similar to a reference image comprising the steps of: partitioning the reference image and the test image into a plurality of blocks of pixels, the blocks in the reference image being of the same shape and size as the blocks in the test image and occupying the same positions within the images to form a plurality of block pairs; initially selecting a first block pair having a maximum likelihood of dissimilarity; calculating a difference measure between the blocks in one of the block pairs; comparing the difference measure with a threshold to determine whether the one block pair indicates similarity of the reference and test images; terminating the calculating and comparing steps if the difference measure between the reference image and the test image exceeds the threshold; and providing an indication that the reference and test images are similar if the difference measures for all the block pairs fall below the threshold.