Research Article
Improved Chaos-Based Cryptosystem for Medical Image Encryption and Decryption
Table 6
Comparative study of entropy values.
| | Image | Ordinary image | Medical image | | Entropy | Global | Local | Global | Local |
| | Reference [3] | — | — | 7.99950 | 7.90300 | | Reference [5] | — | — | 7.99930 | — | | Reference [6] | — | — | 7.99954 | — | | Reference [7] | 7.99930 | — | — | — | | Reference [8] | 7.98910 | — | — | — | | Reference [9] | 7.99932 | — | — | — | | Reference [10] | 7.98830 | — | — | — | | Reference [11] | 7.99930 | — | — | — | | Reference [12] | 7.99720 | — | — | — | | Reference [22] | — | — | 7.99740 | — | | Proposed algorithm | 7.99985 | 7.95486 | 7.99998 | 7.95627 |
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