Table 9 Quality of the recovery for methods 1 and 2 (three levels)
From: Progressive sharing of multiple images with sensitivity-controlled decoding
Secret images | Progressive thresholds ( r j1 , r j2 , r j3 ) | Image quality of the recovery on level 1 | Image quality of the recovery on level 2 | Image quality of the recovery on level 3 | ||||
|---|---|---|---|---|---|---|---|---|
PSNR | SSIM | MSE | PSNR | SSIM | MSE | |||
House | 2&3&4 | 26.29 | 0.806 | 152.75 | 33.06 | 0.909 | 32.07 | Lossless |
3&4&5 | 26.84 | 0.816 | 134.42 | 34.06 | 0.915 | 25.47 | Lossless | |
4&5&6 | 28.23 | 0.844 | 97.53 | 34.85 | 0.917 | 21.27 | Lossless | |
Cameraman | 2&3&4 | 24.95 | 0.786 | 207.66 | 30.35 | 0.894 | 59.98 | Lossless |
3&4&5 | 25.58 | 0.805 | 179.78 | 31.00 | 0.901 | 51.65 | Lossless | |
4&5&6 | 26.05 | 0.818 | 161.20 | 31.53 | 0.904 | 45.64 | Lossless | |
Lena | 2&3&4 | 25.50 | 0.738 | 182.87 | 31.25 | 0.895 | 48.72 | Lossless |
3&4&5 | 26.40 | 0.784 | 148.76 | 32.15 | 0.906 | 39.55 | Lossless | |
4&5&6 | 27.39 | 0.815 | 118.55 | 32.95 | 0.911 | 32.96 | Lossless | |
Pepper | 2&3&4 | 25.14 | 0.764 | 199.03 | 32.04 | 0.916 | 40.64 | Lossless |
3&4&5 | 26.05 | 0.800 | 161.45 | 33.09 | 0.923 | 31.85 | Lossless | |
4&5&6 | 27.04 | 0.824 | 128.52 | 33.43 | 0.924 | 29.50 | Lossless | |
Jet | 2&3&4 | 24.50 | 0.772 | 230.19 | 30.26 | 0.905 | 61.16 | Lossless |
3&4&5 | 25.29 | 0.794 | 191.95 | 31.08 | 0.913 | 50.60 | Lossless | |
4&5&6 | 25.86 | 0.819 | 168.33 | 31.66 | 0.914 | 44.26 | Lossless | |
Blonde | 2&3&4 | 25.92 | 0.732 | 166.31 | 31.54 | 0.889 | 45.59 | Lossless |
3&4&5 | 26.84 | 0.767 | 134.47 | 32.50 | 0.899 | 36.50 | Lossless | |
4&5&6 | 27.33 | 0.795 | 120.16 | 32.93 | 0.904 | 33.82 | Lossless | |