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Figure 15
Comparison of resulting tomograms after different denoising procedures on 00076. Top to bottom: noisy reconstructed object; Münch et al. (2009BB1)BB20; Vo et al. (2018BB1)BB26; proposed procedure based on BM3D denoising. Münch et al. (2009BB1)BB20 manage to remove almost all noise in both low and high frequencies, but create artifacts where the original did not have any, as seen from the rightmost zoom. The proposed denoising procedure removes most of the noise [including the wide streaks still present in Vo et al. (2018BB1)BB26], and does not introduce further artifacts. Note also the central pixel, magnified in the middle, which is very dark for both Münch et al. (2009BB1)BB20 and Vo et al. (2018BB1)BB26, whereas the proposed procedure does not leave any visible artifact.

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