Research Article
A Strong Robust Zero-Watermarking Scheme Based on Shearlets’ High Ability for Capturing Directional Features
Table 8
The
values of distorted host images and
values of extracted watermarks after rotating.
| Host image | | | | | | SSIM/NC | SSIM/NC | SSIM/NC | SSIM/NC | SSIM/NC |
| Boat | 0.87/0.9776 | 0.83/0.9776 | 0.81/0.9716 | 0.79/0.9763 | 0.75/0.9706 | Goldhill | 0.83/0.9643 | 0.80/0.9629 | 0.77/0.9616 | 0.75/0.9677 | 0.71/0.9669 | Baboon | 0.66/0.9389 | 0.64/0.9327 | 0.62/0.9327 | 0.61/0.9343 | 0.58/0/9334 | Barbara | 0.75/0.9608 | 0.72/0.9622 | 0.69/0.9662 | 0.67/0.9673 | 0.63/0.9673 | Peppers | 0.85/0.9809 | 0.82/0.9776 | 0.79/0.9762 | 0.77/0.9885 | 0.73/0.9849 | Man | 0.83/0.9466 | 0.81/0.9466 | 0.78/0.9418 | 0.76/0.9549 | 0.72/0.9590 |
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