Research Article
A Novel Encryption Frame for Medical Image with Watermark Based on Hyperchaotic System
Table 4
Coefficients of images of different sizes.
| | Coefficients | Plain-image | Cypher-image | | Horizontal | Vertical | Diagonal | Horizontal | Vertical | Diagonal |
| | Im11 | 0.9935 | 0.9897 | 0.9847 | 0.0193 | −0.0154 | 0.0032 | | Im21 | 0.9753 | 0.9711 | 0.9610 | 0.0124 | 0.0080 | 0.0445 | | Im31 | 0.9862 | 0.9849 | 0.9730 | 0.0177 | −0.0081 | −0.0325 |
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