Research Article
A QR Code Based Zero-Watermarking Scheme for Authentication of Medical Images in Teleradiology Cloud
Table 3
Comparison for JPEG compression attacks (BER).
| Scheme | Quality factor | 100% | 90% | 80% | 70% |
| Kim et al. [27] | 0.0732 (Spatial) | 0.1953 (Spatial) | 4.6143 (Spatial) | 12.0850 (Spatial) | Proposed scheme | | | | | CT | 0.0001 | 0.0001 | 0.0006 | 0.0005 | Mammogram | 0.0185 | 0.0182 | 0.0253 | 0.0209 | MRA | 0.0002 | 0.0002 | 0.0002 | 0.0006 | Nuclear | 0.0001 | 0.0001 | 0.0001 | 0.0002 | PET | 0.0004 | 0.0005 | 0.0009 | 0.0010 | Ultrasound | 0.0001 | 0.0001 | 0.0001 | 0.0001 | X-ray | 0.0022 | 0.0018 | 0.0034 | 0.0042 |
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