Table 1: PSNR (dB) and SSIM results for different algorithms. In each cell, four groups of denoising results are shown. Top row, Wavelets; second row, NL-means; third row, NMF -H; bottom row, PCDDL.

Input PSNR
Lena Barbara Boat House Pepper Average
PSNR SSIM PSNR SSIM PSNR SSIM PSNR SSIM PSNR SSIM PSNR SSIM

32.91 0.8775 29.61 0.8633 30.28 0.8093 33.05 0.8669 31.20 0.8881 31.41 0.8610
29.97 37.76 0.9370 36.62 0.9583 35.55 0.9205 38.17 0.9357 36.02 0.9485 36.82 0.9400
29.23 0.9224 33.15 0.9538 35.95 0.9451 33.68 0.9519 35.76 0.9568 33.55 0.9460
39.390.949138.690.964138.08 0.9445 40.100.958038.630.957738.980.9547

20.12 28.52 0.7982 25.03 0.7168 26.63 0.6988 28.03 0.7856 26.24 0.7902 26.89 0.7579
33.45 0.8756 31.74 0.8914 31.04 0.8148 34.06 0.8729 32.06 0.8929 32.47 0.8695
29.61 0.8680 30.82 0.9056 29.17 0.8232 33.93 0.8846 28.22 0.8788 30.35 0.8720
34.390.879132.58 0.8870 32.240.837634.32 0.8714 32.70 0.8839 33.25 0.8718

14.09 25.74 0.7312 22.71 0.6044 24.23 0.6101 24.90 0.7220 23.15 0.7021 24.15 0.6740
30.14 0.8039 27.52 0.7867 27.69 0.7145 30.44 0.8087 28.52 0.8235 28.86 0.7875
27.68 0.7870 24.63 0.7411 24.10 0.6578 27.64 0.8170 22.87 0.7604 25.38 0.7527
31.24 0.7953 28.71 0.7700 28.80 0.7137 31.21 0.7981 29.27 0.7933 29.85 0.7741

8.82 23.47 0.6712 21.07 0.5249 22.32 0.5384 22.51 0.6666 20.56 0.6164 21.99 0.6035
27.18 0.6876 24.32 0.6402 24.99 0.5938 26.60 0.6767 24.97 0.7114 25.61 0.6619
21.58 0.6677 19.60 0.5175 20.38 0.5190 21.41 0.6746 19.31 0.6232 20.46 0.6004
28.38 0.6727 25.26 0.5986 26.08 0.5693 28.370.691726.27 0.6643 26.87 0.6393