Table 4 PSNR (dB) comparison of multichannel image denoising algorithms
Methods | Noise variance | |||||
|---|---|---|---|---|---|---|
| Â | 15 | 20 | 25 | 30 | 40 | 50 |
Sebkha | Â | |||||
 Noisy image | 25.14 | 22.89 | 21.26 | 18.73 | 17.06 | 15.56 |
 DWT (NeighShrink) | 26.09 | 23.79 | 22.18 | 19.63 | 17.94 | 16.45 |
 DT-CWT (NeighShrink) | 27.25 | 24.95 | 23.32 | 20.77 | 19.06 | 17.57 |
 DT-QWT (NeighShrink) | 27.29 | 24.98 | 23.36 | 20.79 | 19.06 | 17.57 |
 DT-QWT (BiShrink) | 28.50 | 26.19 | 24.57 | 21.99 | 20.25 | 18.75 |
 DT-QWT (NeighShrink/PhaseSmooth) | 30.09 | 27.77 | 26.14 | 23.55 | 21.80 | 20.29 |
Sea | Â | |||||
 Noisy image | 25.87 | 23.16 | 21.18 | 18.91 | 17.14 | 15.28 |
 DWT (NeighShrink) | 26.74 | 24.03 | 22.04 | 19.76 | 17.97 | 16.12 |
 DT-CWT (NeighShrink) | 27.81 | 25.10 | 23.11 | 20.82 | 19.02 | 17.17 |
 DT-QWT (NeighShrink) | 27.86 | 25.15 | 23.17 | 20.83 | 19.02 | 17.17 |
 DT-QWT (BiShrink) | 29.09 | 26.38 | 24.39 | 22.07 | 20.26 | 19.21 |
 DT-QWT (NeighShrink/PhaseSmooth) | 30.77 | 28.06 | 26.04 | 23.74 | 21.92 | 20.87 |