Figure 15
From: Brain MR image denoising for Rician noise using pre-smooth non-local means filter
Comparison of experiment results on PD-weighted MRI. (a) original MRI, (b) noisy MRI with 17% Rician noise, (c) results of the original NLM filter, (d) results of the UNLM with squared magnitude transformation, (e) results of the PSNLM1 with median filter, (f) results of the PSNLM1 with Gaussian filter, (g) results of the PSNLM1 with anisotropic filter, (h) results of the UNLM with VST, (i) results of the PSNLM2 with median filter, (j) results of the PSNLM2 with Gaussian filter, (k) results of the PSNLM2 with anisotropic filter.