Research Article
Cryptanalysis and Improvement of the Robust and Blind Watermarking Scheme for Dual Color Image
Table 1
Performance comparison between the different methods in terms of JPEG compression (CR, compression ratio).
| | | CR (%) | 10 | 20 | 30 | 40 | 50 | 60 |
| | Reference [15] | PSNR (dB) | 35.4 | 34.8 | NA | NA | NA | NA | | NC | 1.00 | 0.29 | NA | NA | NA | NA |
| | Reference [16] | PSNR (dB) | 35.4 | 34.8 | 32.6 | 31.1 | NA | NA | | NC | 0.99 | 0.50 | 0.12 | 0.07 | NA | NA |
| | Original | PSNR (dB) | 33.6428 | 32.2108 | 31.8814 | 31.2290 | 30.8597 | 30.4745 | | NC | 1.0000 | 1.0000 | 1.0000 | 0.9996 | 0.9792 | 0.9769 |
| | Improved | PSNR (dB) | 33.6429 | 32.2107 | 31.8816 | 31.2288 | 30.8597 | 30.4744 | | NC | 1.0000 | 1.0000 | 1.0000 | 0.9995 | 0.9792 | 0.9768 |
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