Table 9 The performance evaluation under the geometric attacks
From: Adaptive reversible image watermarking algorithm based on IWT and level set
Original image attack types | Lena | Baboon | Girl | Peppers | ||||
|---|---|---|---|---|---|---|---|---|
PSNR | NC2 | PSNR | NC2 | PSNR | NC2 | PSNR | NC2 | |
No attack | 48.68 | 1 | 46.45 | 1 | 48.24 | 1 | 49.34 | 1 |
Rotate 10° | 47.47 | 0.994 | 45.30 | 0.995 | 47.38 | 0.994 | 48.20 | 0.996 |
Rotate 30° | 46.03 | 0.993 | 45.75 | 0.993 | 46.63 | 0.992 | 47.70 | 0.994 |
Shrink 30% | 45.49 | 0.998 | 43.64 | 0.995 | 45.76 | 0.997 | 46.59 | 0.998 |
Enlarge 20% | 47.81 | 1 | 45.37 | 1 | 47.40 | 1 | 48.23 | 1 |
Shear 10% | 42.39 | 1 | 40.57 | 1 | 41.63 | 1 | 43.28 | 0.942 |
Shear 20% | 37.57 | 1 | 35.54 | 0.967 | 37.56 | 1 | 38.50 | 0.907 |