Research Article
FPGA Implementation of Improved Security Approach for Medical Image Encryption and Decryption
Table 4
Global and local Shannon entropy values of encrypted images.
| | Image | Local Shannon entropy | Global Shannon entropy | | Red | Green | Blue | Red | Green | Blue |
| | Lena | 7.9548 | 7.9542 | 7.9546 | 7.99988 | 7.99989 | 7.99989 | | Peppers | 7.9546 | 7.9544 | 7.9549 | 7.99989 | 7.99987 | 7.99986 | | Baboon | 7.9554 | 7.9553 | 7.9557 | 7.99994 | 7.99989 | 7.99978 | | 3D ultrasound | 7.9557 | 7.9548 | 7.9552 | 7.99999 | 7.99999 | 7.99999 | | 3D ankle | 7.9563 | 7.9559 | 7.9559 | 7.99999 | 7.99999 | 7.99999 | | MRI | 9.9553 | 7.99988 |
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