From: Optimal watermark embedding combining spread spectrum and quantization
Image | Method | Median filter | JPEG | AWGN | Salt & pepper |
---|---|---|---|---|---|
 |  | 3×3 | QF=11 | σ n =10 | p s =1 % |
Peppers | Wang [21] | 29.35 | 26.10 | 1.25 | 2.00 |
Peppers | Ours | 0.78 | 0.78 | 0.78 | 0.78 |
Baboon | Wang [21] | 31.65 | 16.95 | 1.30 | 1.95 |
Baboon | Ours | 7.03 | 3.91 | 0.78 | 1.56 |
Barbara | Wang [21] | 24.95 | 16.45 | 1.45 | 2.25 |
Barbara | Ours | 3.13 | 3.52 | 0.39 | 2.34 |
Lena | Wang [21] | 30.80 | 29.80 | 1.45 | 2.45 |
Lena | Ours | 0 | 1.17 | 0 | 0.78 |