Research Article
Visually Meaningful Image Encryption Scheme Based on DWT and Schur Decomposition
Table 7
Grayscale images: the similarity test between different visual images and corresponding cover images.
| Plain image | Host image | NC | H | Host image | Visual image |
| Cameraman () | Lena | 0.9997 | 7.4456 | 7.4512 | Baboon | 0.9997 | 7.3579 | 7.3604 | Peppers | 0.9997 | 7.5937 | 7.5993 |
| Boat () | Baboon | 0.9997 | 7.3579 | 7.3603 | Bridge | 0.9997 | 5.7056 | 7.2360 | Peppers | 0.9997 | 7.5937 | 7.5997 |
| Lena () | Pentagon | 0.9998 | 6.7327 | 6.7489 | Landscape | 0.9999 | 7.4402 | 7.4476 | Male | 0.9996 | 7.5237 | 7.5344 |
| Bridge () | Pentagon | 0.9998 | 6.7327 | 6.7489 | Landscape | 0.9999 | 7.4402 | 7.4474 | Male | 0.9996 | 7.5237 | 7.5347 |
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