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 |
Gaussian filter (3 × 3,\( \boldsymbol{\upsigma} \) =0.5) | 45.57 | 0.947 | 44.14 | 0.933 | 45.69 | 0.945 | 45.50 | 0.941 |
Gaussian filter (3 × 3,\( \boldsymbol{\upsigma} \) = 0.3) | 47.24 | 0.982 | 46.08 | 0.974 | 47.97 | 0.981 | 47.77 | 0.983 |
Median filtering (3 × 3) | 45.34 | 0.963 | 44.27 | 0.954 | 45.67 | 0.959 | 45.91 | 0.965 |
Gaussian noise (0.03) | 47.11 | 0.971 | 45.95 | 0.966 | 46.78 | 0.972 | 47.23 | 0.974 |
Salt and pepper noise (0.03) | 46.28 | 0.953 | 44.08 | 0.95 | 45.60 | 0.95 | 46.15 | 0.95 |
JPEG (Q = 30) | 44.53 | 0.941 | 43.21 | 0.929 | 44.82 | 0.934 | 45.21 | 0.936 |
JPEG (Q = 50) | 45.98 | 0.984 | 44.70 | 0.976 | 45.79 | 0.981 | 46.54 | 0.978 |