Research Article
A Novel Encryption Frame for Medical Image with Watermark Based on Hyperchaotic System
Table 1
Capacity and PSNR of medical images with size of
with block size of
.
| | Images | Im11 | Im12 | Im13 | Im14 | Im15 |
Im16 | Im17 | Im18 |
| | Capacity (bit) | 42617 | 42593 | 48997 | 52359 | 51644 | 41515 | 433448 | 49221 | | PSNR (dB) | 56.24 | 56.04 | 55.70 | 56.01 | 56.08 | 55.72 | 56.05 | 55.58 | | ROI blocks number | 86 | 83 | 85 | 85 | 82 | 87 | 87 | 88 | | Threshold | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
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