Table 2: Watermarked Medical Cover Image (Logo embedded in the HL subband).
Type of Attack |
X-rays Modality |
MRI Modality |
CT Scan Modality |
PSNR |
SSIM |
NC |
PSNR |
SSIM |
NC |
PSNR |
SSIM |
NC |
No attack |
32.996 |
0.604 |
0.990 |
29.665 |
0.597 |
0.971 |
29.620 |
0.614 |
0.951 |
Mean |
31.713 |
0.373 |
0.991 |
28.070 |
0.492 |
0.981 |
28.085 |
0.363 |
0.958 |
Median |
33.656 |
0.510 |
0.992 |
30.978 |
0.615 |
0.981 |
30.122 |
0.533 |
0.959 |
Noise |
09.212 |
0.090 |
0.545 |
09.630 |
0.101 |
0.481 |
13.645 |
0.246 |
0.375 |
Rotation |
13.338 |
0.103 |
0.543 |
13.447 |
0.013 |
0.174 |
16.151 |
0.010 |
0.506 |
Shear |
14.251 |
0.186 |
0.659 |
13.874 |
0.023 |
0.281 |
15.536 |
0.013 |
0.397 |
Contrast |
11.642 |
0.337 |
0.990 |
11.507 |
0.321 |
0.971 |
10.395 |
0.179 |
0.951 |
Compression |
04.086 |
0.069 |
0.553 |
02.937 |
0.006 |
0.491 |
02.299 |
0.005 |
0.382 |
Tampering |
18.666 |
0.473 |
0.867 |
17.150 |
0.461 |
0.740 |
13.254 |
0.459 |
0.604 |