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In this paper, we design a novel MRF framework which is called Non-Local Range Markov Random Field (NLR-MRF). The local spatial range of clique in traditional MRF is extended to the non-local range which is defined over the local patch and also its similar patches in a non-local window. Then the traditional local spatial filter is extended to the non-local range filter that convolves an image over the non-local ranges of pixels. In this framework, we propose a gradient-based discriminativedoi:10.1109/cvpr.2011.5995520 dblp:conf/cvpr/SunT11 fatcat:vrar4zm63zfoxhoxglnb4tjo54