Image denoising using group sparsity residual and external nonlocal self-similarity prior

  title={Image denoising using group sparsity residual and external nonlocal self-similarity prior},
  author={Zhiyuan Zha and Xinggan Zhang and Qiong Wang and Yechao Bai and Lan Tang},
  journal={2017 IEEE International Conference on Image Processing (ICIP)},
Nonlocal image representation has been successfully used in many image-related inverse problems including denoising, deblurring and deblocking. However, due to a majority of reconstruction methods only exploit the nonlocal self-similarity (NSS) prior of the degraded observation image, it is very challenging to reconstruct the latent clean image directly from the noisy observation. In this paper we propose a novel model for image denoising via group sparsity residual and external NSS prior. To… 

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