Research Article
A Novel Encryption Frame for Medical Image with Watermark Based on Hyperchaotic System
Table 3
Capacity and PSNR of medical images with size of
with block size of
.
| | Images | Im31 | Im32 | Im33 | Im34 | Im35 | Im36 | Im37 | Im38 |
| | Capacity (bit) | 702 | 983 | 601 | 684 | 642 | 1147 | 1219 | 1851 | | PSNR (dB) | 59.90 | 58.27 | 60.92 | 60.21 | 60.53 | 57.46 | 56.94 | 55.51 | | ROI blocks number | 74 | 88 | 64 | 74 | 67 | 93 | 112 | 144 | | Threshold | 2000 | 2000 | 5000 | 2000 | 2000 | 2000 | 2000 | 2000 |
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