Table 3: Watermarked Medical Cover Image (Logo embedded in the HH subband).
Type of Attack |
X-rays Modality |
MRI Modality |
CT Scan Modality |
PSNR |
SSIM |
NC |
PSNR |
SSIM |
NC |
PSNR |
SSIM |
NC |
No attack |
34.283 |
0.585 |
0.995 |
31.556 |
0.538 |
0.979 |
31.741 |
0.658 |
0.977 |
Mean |
33.992 |
0.434 |
0.996 |
30.145 |
0.529 |
0.990 |
30.942 |
0.416 |
0.983 |
Median |
36.439 |
0.538 |
0.997 |
32.418 |
0.629 |
0.992 |
33.246 |
0.607 |
0.986 |
Noise |
09.212 |
0.091 |
0.549 |
09.630 |
0.099 |
0.491 |
13.645 |
0.268 |
0.401 |
Rotation |
13.162 |
0.104 |
0.548 |
14.769 |
0.015 |
0.174 |
16.652 |
0.011 |
0.511 |
Shear |
14.112 |
0.188 |
0.665 |
15.258 |
0.028 |
0.288 |
16.028 |
0.021 |
0.406 |
Contrast |
11.515 |
0.319 |
0.995 |
12.541 |
0.284 |
0.979 |
10.852 |
0.185 |
0.977 |
Compression |
04.099 |
0.071 |
0.557 |
02.988 |
0.008 |
0.501 |
02.470 |
0.007 |
0.408 |
Tampering |
18.629 |
0.467 |
0.872 |
18.493 |
0.429 |
0.752 |
15.504 |
0.531 |
0.712 |