Research Article
Magnetic Resonance Image Denoising Algorithm Based on Cartoon, Texture, and Residual Parts
Table 4
PSNR values of denoising the cartoon, texture, and residual parts in order (W: Wiener filter, H: hard threshold, and S: soft threshold).
| Noise variance | 0.01 | 0.03 | 0.05 | 0.07 | 0.09 |
| PSNR of MRI 1 | SHW | 29.34 | 25.5 | 23.52 | 21.42 | 20.99 | SWH | 28.7 | 24.07 | 22 | 20.06 | 19.67 | HSW | 24.7 | 23.02 | 19.49 | 19.65 | 17.66 | HWS | 24.34 | 22.24 | 20.91 | 19.83 | 19.13 | WSH | 29.77 | 25.32 | 20.25 | 20.34 | 18.03 | WHS (proposed) | 29.48 | 25.73 | 23.6 | 22.13 | 20.95 | Max | 29.77 | 25.73 | 23.6 | 22.13 | 20.99 |
| PSNR of MRI 2 | SHW | 29.24 | 23.99 | 23.63 | 22.14 | 21.16 | SWH | 28.19 | 22.72 | 21.94 | 20.62 | 19.75 | HSW | 24.98 | 23.32 | 15.52 | 20.54 | 13.89 | HWS | 24.47 | 22.34 | 21.03 | 20.04 | 19.32 | WSH | 29.81 | 25.56 | 15.78 | 21.27 | 14.01 | WHS (proposed) | 29.79 | 25.92 | 23.78 | 22.24 | 21.13 | Max | 29.81 | 25.92 | 23.78 | 22.24 | 21.16 |
| PSNR of MRI 3 | SHW | 29.51 | 25.66 | 23.26 | 21.46 | 20.81 | SWH | 28.73 | 24 | 21.86 | 20.08 | 19.6 | HSW | 22.48 | 22.95 | 20.65 | 19.69 | 18.57 | HWS | 24.7 | 22.41 | 20.95 | 19.88 | 19.18 | WSH | 24.49 | 24.91 | 21.54 | 20.3 | 18.95 | WHS (proposed) | 29.85 | 25.9 | 23.7 | 22.11 | 20.89 | Max | 29.85 | 25.9 | 23.7 | 22.11 | 20.89 |
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