Table 10 The quality of extracted watermarked fromCrowd 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 | 51.38 dB | 0.9969 | 0.9985 | 0.9974 |
AF( | 25.19 dB | 0.3432 | 0.4803 | 0.4346 |
S(1/2) + B(3) + JP(60) | 24.30 dB | 0.3040 | 0.4584 | 0.4490 |
SH(1) + MF( | 24.53 dB | 0.2400 | 0.4056 | 0.3132 |
MF( | 25.79 dB | 0.3029 | 0.3505 | 0.4132 |
GN(0, 0.002) + MF( | 25.90 dB | 0.2306 | 0.4034 | 0.3389 |
GL( | 29.24 dB | 0.4064 | 0.4708 | 0.5851 |
WF( | 27.91 dB | 0.3666 | 0.4660 | 0.5051 |
B(2) + GN(0,0.002) + JP(50) | 26.06 dB | 0.3099 | 0.5306 | 0.4455 |
C(40%) | 14.70 dB | 0.1818 | 0.3195 | 0.7337 |
S(1/4) + JP(40) | 23.86 dB | 0.2030 | 0.2344 | 0.4182 |
of extracted watermark
) + JP(50)
)
) + S(1/2) + JP(60)
) + JP(50)
) + CAR(1,1.2) + JP(50)
) + B(2) + JP(40)