Table 9 The quality of extracted watermarked from Peppers image (
) with watermark size 
(Figure 11(b)) versus several attacks in different methods.
) with watermark size 
(Figure From: A New Robust Watermarking Scheme to Increase Image Security
| Â | Â |
| ||
|---|---|---|---|---|
Attack type | Watermarked image PSNR | Mohanty method [24] | Asatryan method [27] | Proposed method |
No Attack | 51.72 dB | 0.9974 | 0.9990 | 0.9979 |
AF( | 29.80 dB | 0.4233 | 0.6118 | 0.5943 |
S(1/2)+B(3) + JP(60) | 29.35 dB | 0.3711 | 0.4999 | 0.5492 |
SH(1) + MF( | 29.52 dB | 0.4277 | 0.6256 | 0.5750 |
MF( | 30.66 dB | 0.4405 | 0.3304 | 0.5490 |
GN(0, 0.002) + MF( | 30.34 dB | 0.2832 | 0.4481 | 0.4021 |
GL( | 31.79 dB | 0.6008 | 0.4568 | 0.7637 |
WF( | 31.13 dB | 0.5343 | 0.5928 | 0.6697 |
B(2) + GN(0,0.002) + JP(50) | 27.60 dB | 0.3900 | 0.5222 | 0.5152 |
C(40%) | 17.06 dB | 0.2080 | 0.3710 | 0.6544 |
S(1/4) + JP(40) | 29.06 dB | 0.3827 | 0.3535 | 0.6415 |
of extracted watermark
) + JP(50)
)
) + S(1/2) + JP(60)
) + JP(50)
) + CAR(1,1.2) + JP(50)
) + B(2) + JP(40)