Research Article
A QR Code Based Zero-Watermarking Scheme for Authentication of Medical Images in Teleradiology Cloud
Table 4
Comparison for rotation attacks (BER).
| Scheme | Angle of rotation | 30° | 45° | 60° |
| Kim et al. [27] | 17.52 (Spatial) | 49.38 (FFT) | 4.83 (Spatial) | Proposed scheme | | | | CT | 0.0002 | 0.0001 | 0.0001 | Mammogram | 0.0093 | 0.0092 | 0.0064 | MRA | 0.0002 | 0.0001 | 0.0001 | Nuclear | 0.0006 | 0.0004 | 0.0001 | PET | 0.0005 | 0.0004 | 0.0002 | Ultrasound | 0.0004 | 0.0001 | 0.0016 | X-ray | 0.0011 | 0.0002 | 0.0002 |
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