Research Article
Host Feasibility Investigation to Improve Robustness in Hybrid DWT+SVD Based Image Watermarking Schemes
Table 1
Average NC for S coefficients in the first and second level of SVD for 33 images 512
512.
| Attacks | Gaussian 0.01 | Gamma correction 0.1 | AVG filter 33 | Crop 1/4 | S&Pāā 0.01 | Scaling 1/2 | Speckle 0.01 | Median 33 | Rot 50 |
| | 0.9877 | 0.9983 | 0.9881 | 0.9959 | 0.9880 | 1 | 0.9882 | 0.9880 | 0.9861 | | 0.9775 | 0.9899 | 0.9757 | 0.9929 | 0.9785 | 0.9992 | 0.9790 | 0.9771 | 0.9857 |
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