Research Article
Color Zero-Watermarking Algorithm for Medical Images Based on BEMD-Schur Decomposition and Color Visual Cryptography
Table 7
NC values under geometric translation attacks.
| Attack type | Attack strength | Fundus1 | Fundus2 | Fundus3 | Fundus4 | Cerebral1 | Cerebral2 | Cerebral3 | Cerebral4 |
| Translation | 10 | 0.9802 | 0.9782 | 0.9835 | 0.9816 | 0.9637 | 0.9631 | 0.9761 | 0.9637 | 30 | 0.9564 | 0.9470 | 0.9640 | 0.9604 | 0.9427 | 0.9323 | 0.9534 | 0.9253 | 50 | 0.9359 | 0.9233 | 0.9470 | 0.9415 | 0.9211 | 0.9118 | 0.9443 | 0.9135 |
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