Research Article
Improved Chaos-Based Cryptosystem for Medical Image Encryption and Decryption
Table 7
ρ values of the original image and its corresponding encrypted image.
| Image | Direction | Original image | Encrypted image | Red | Blue | Green | Red | Blue | Green |
| Lena (512 × 512 × 3) | H | 0.9588 | 0.9358 | 0.9160 | −0.0196 | −0.0145 | −0.0546 | V | 0.9818 | 0.9665 | 0.9522 | −0.0162 | −0.0184 | −0.0082 | D | 0.9900 | 0.9810 | 0.9737 | −0.0078 | −0.0012 | −0.0049 |
| Peppers (512 × 512 × 3) | H | 0.9617 | 0.9658 | 0.9443 | −0.0136 | −0.0070 | −0.0014 | V | 0.9814 | 0.9789 | 0.9671 | −0.0288 | −0.0054 | 0.0046 | D | 0.9666 | 0.9655 | 0.9455 | −0.0310 | −0.0294 | 0.0084 |
| Baboon (512 × 512 × 3) | H | 0.8656 | 0.9291 | 0.8399 | 0.0053 | 0.0063 | −0.0040 | V | 0.7897 | 0.8848 | 0.7629 | 0.0020 | 0.0076 | 0.0098 | D | 0.8855 | 0.9309 | 0.8619 | 0.0077 | 0.0049 | −0.0075 |
| 3D ultrasound baby (2844 × 4044 × 3) | H | 0.8989 | 0.9008 | 0.8360 | −0.0022 | −0.0024 | −0.0020 | V | 0.9720 | 0.9723 | 0.9559 | −0.0056 | −0.0090 | −0.0013 | D | 0.9789 | 0.9815 | 0.9662 | −0.0019 | −0.0082 | −0.0002 |
| 3D scanner ankle (1080 × 1920 × 3) | H | 0.9981 | 0.9983 | 0.9963 | −0.0073 | −0.0187 | −0.0100 | V | 0.9975 | 0.9984 | 0.9956 | −0.0319 | −0.0259 | −0.0061 | D | 0.9993 | 0.9992 | 0.9984 | −0.0024 | −0.0051 | −0.0179 |
| 3D radiography (2400 × 2956 × 3) | H | 0.9993 | 0.9994 | 0.9994 | −0.0022 | −0.0018 | −0.0007 | V | 0.9989 | 0.9916 | 0.9945 | −0.0029 | −0.0036 | −0.0032 | D | 0.9946 | 0.9944 | 0.9901 | −0.0015 | −0.0019 | −0.0002 |
| 3D X-ray (3816 × 2832 × 3) | H | 0.9981 | 0.9971 | 0.9955 | −0.0241 | −0.0051 | −0.0164 | V | 0.9995 | 0.9990 | 0.9986 | −0.0071 | −0.0034 | −0.0180 | D | 0.9995 | 0.9990 | 0.9987 | −0.0043 | −0.0108 | −0.0336 |
| 3D CT-scan (800 × 600 × 3) | H | 0.9946 | 0.9944 | 0.9901 | −0.0018 | −0.0066 | −0.0011 | V | 0.9946 | 0.9944 | 0.9891 | −0.0012 | −0.0033 | −0.0039 | D | 0.9944 | 0.9941 | 0.9897 | −0.0046 | −0.0018 | −0.0026 |
| 1D ultrasound (1200 × 700 × 1) | H | 0.9865 | −0.00012 | V | 0.9843 | −0.00084 | D | 0.9839 | −0.00069 |
| MRI (456 × 456 × 1) | H | 0.9144 | −0.0022 | V | 0.9346 | −0.0041 | D | 0.99422 | −0.0019 |
| Endoscopy (634 × 549 × 1) | H | 0.9882 | −0.0260 | V | 0.9869 | −0.0022 | D | 0.9847 | −0.0047 |
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