[4] Buades A, Coll B, Morel J M. A non-local algorithm for image denoising. [C]// 2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 2, 60-65(2005).
[6] Kervrann C, Boulanger J, Coupé P. Bayesian non-local means filter, image redundancy and adaptive dictionaries for noise removal. [C]// International Conference on Scale Space and Variational Mehtods in Computer Vision, 4485, 520-532(2007).
[11] Xu G Y. Research on nonlocal image denoising methods and their applications[D]. Hefei: Hefei University of Technology(2013).