Figure 14
Comparison of sinograms after different denoising procedures on 00076. Top to bottom: noisy sinogram Z; Münch et al. (2009); Vo et al. (2018); proposed procedure based on BM3D denoising. Note how in the zoom-in the proposed method manages to remove streak noise without creating additional artifacts. Münch et al. (2009) creates a horizontal streak-like artifacts as seen in the middle of the zoom-in, not present in the noisy sinogram; Vo et al. (2018) does not fully denoise the sinogram. |