Table 8 The quality of extracted watermark from Baboon 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
Attack type | Â |
| ||
|---|---|---|---|---|
| Â | Watermarked image PSNR | Mohanty method [24] | Asatryan method [27] | Proposed method |
No Attack | 48.47 dB | 0.9961 | 0.9986 | 0.9966 |
AF( | 24.32 dB | 0.3857 | 0.5036 | 0.4550 |
S(1/2) + B(2) + JP(60) | 25.59 dB | 0.3973 | 0.4318 | 0.5109 |
SH(1) + MF( | 23.86 dB | 0.3128 | 0.6555 | 0.5246 |
MF( | 24.37 dB | 0.3033 | 0.4202 | 0.4293 |
GN(0, 0.002) + MF( | 24.34 dB | 0.3048 | 0.5439 | 0.4032 |
GL( | 27.68 dB | 0.4485 | 0.3643 | 0.6176 |
WF( | 26.48 dB | 0.4079 | 0.4459 | 0.5079 |
B(2) + GN(0,0.002) + JP(50) | 25.13 dB | 0.4239 | 0.5226 | 0.5020 |
C(40%) | 20.29 dB | 0.1279 | 0.3880 | 0.4183 |
S(1/4) + JP(40) | 23.45 dB | 0.2017 | 0.1212 | 0.4027 |
of extracted watermark
) + JP(50)
)
) + S(1/2) + JP(60)
) + JP(50)
) + CAR(1,1.2) + JP(50)
) + B(2) + JP(40)