Fig. 7From: A wavelet denoising approach based on unsupervised learning modelDenoising performance comparisons of “Barbara” with the noise deviation σ=50 by different methods. a Noisy image. b Denoised image by wavelet thresholding. c Denoised image by TV. d Denoised image by K-SVD. e Denoised image by BM3D. f Denoised image by the proposed methodBack to article page