Research Article
A Strong Robust Zero-Watermarking Scheme Based on Shearlets’ High Ability for Capturing Directional Features
Table 7
The
values of distorted host images and
values of extracted watermarks after scaling.
| Host image | | | 2 | 4 | SSIM/NC | SSIM/NC | SSIM/NC | SSIM/NC |
| Boat | 0.91/0.9836 | 0.97/0.9810 | 0.99/0.9980 | 0.99/0.9980 | Goldhill | 0.88/0.9763 | 0.96/0.9869 | 0.99/0.9915 | 0.99/0.9915 | Baboon | 0.73/0.9676 | 0.88/0.9770 | 0.97/0.9928 | 0.97/0.9922 | Barbara | 0.80/0.9783 | 0.92/0.9889 | 0.98/0.9922 | 0.98/0.9922 | Peppers | 0.89/0.9817 | 0.93/0.9993 | 0.98/1.0000 | 0.98/1.0000 | Man | 0.89/0.9784 | 0.95/0.9856 | 0.99/0.9948 | 0.99/0.9948 |
|
|