Research Article
Visually Meaningful Image Encryption Scheme Based on DWT and Schur Decomposition
| Algorithm | Sizes | Encryption time | Decryption time |
| Ours | 256 × 256 (gray) | 0.419665 | 0.266402 | 512 × 512 (gray) | 1.810313 | 1.079050 | 256 × 256 (color) | 1.138108 | 0.726431 | 512 × 512 (color) | 5.159817 | 3.102788 |
| Reference [35] | 256 × 256 (color) | 1.85 | — | 512 × 512 (color) | 3.76 | — |
| Reference [22] | 256 × 256 (gray) | 0.4049 | 1.4724 | 512 × 512 (gray) | 0.9279 | 10.5830 |
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