Research Article
Visually Meaningful Image Encryption Scheme Based on DWT and Schur Decomposition
Table 10
MSE and PSNR test results.
| | Algorithms | Plain images | Size | Cover images | MSE | PSNR | | PE | PD | CV | PE | PD | CV |
| | Ours | Cameraman | 256 × 256 | Couple | 9423.4 | 0 | 2.6300 | 8.3887 | Inf | 43.9319 | | Bridge | 9423.4 | 0 | 2.5808 | 8.3887 | Inf | 44.0132 | | Boat | 256 × 256 | Couple | 8075.7 | 0 | 2.7629 | 9.0590 | Inf | 43.7172 | | Bridge | 8075.7 | 0 | 2.6677 | 9.0590 | Inf | 43.8694 | | Tree | 256 × 256 | Couple | 10104.1 | 0 | 2.5703 | 8.0858 | Inf | 44.0310 | | Bridge | 10104.1 | 0 | 2.5900 | 8.0858 | Inf | 43.9978 | | Lena | 512 × 512 | Pentagon | 7757.4 | 0 | 2.4449 | 9.2336 | Inf | 44.2481 | | Landscape | 7757.4 | 0 | 2.4092 | 9.2336 | Inf | 44.3121 | | Boat | 512 × 512 | Pentagon | 8289.8 | 0 | 2.4328 | 8.9454 | Inf | 44.2697 | | Landscape | 8289.8 | 0 | 2.3953 | 8.9454 | Inf | 44.3372 | | Pepper | 512 × 512 | Pentagon | 8413.8 | 0 | 2.4649 | 8.8809 | Inf | 44.2128 | | Landscape | 8413.8 | 0 | 2.3828 | 8.8809 | Inf | 44.3599 |
| | Reference [32] | Cameraman | 256 × 256 | — | 9453.2 | 0 | — | 8.2203 | Inf | — | | Tree | 256 × 256 | — | 9690.2 | 0 | — | 8.7405 | Inf | — | | Pepper | 512 × 512 | — | 8981.6 | 0 | — | 8.1099 | Inf | — |
| | Reference [33] | Lena | 512 × 512 | — | 7762.6 | 0 | — | 9.2307 | Inf | — | | Boat | 512 × 512 | — | 7640.5 | 0 | — | 9.2996 | Inf | — |
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