Research Article
Efficient Hybrid Blind Watermarking in DWT-DCT-SVD with Dual Biometric Features for Images
Table 1
Normalized correlation values.
| # | Attacks | NCB | NCS |
| 1 | Crop | 0.4345 | 0.9922 | 2 | Salt & pepper | 0.7586 | 0.7862 | 3 | Gaussian | 0.7472 | 0.7002 | 4 | Speckle | 0.4865 | 0.8047 | 5 | Rotation | 0.5005 | 0.8827 | 6 | Scale 2X | 0.9590 | 0.9340 | 7 | Scale 0.5X | 0.6307 | 0.7165 | 8 | Median | 0.9650 | 0.9751 | 10 | Sharpening | 0.5507 | 0.6234 | 11 | Motion blur | 0.6217 | 0.8421 | 12 | Average filter | 0.62 | 0.8090 | 13 | Histogram equalization | 0.6012 | 0.6104 | 14 | JPEG | 0.857 | 0.846 | 15 | JPEG2000 | 0.846 | 0.8562 |
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