Research Article
Reversible Image Watermarking Algorithm Based on Quadratic Difference Expansion
Table 3
Algorithmic experimental visual effect.
| Image name | Original image | Watermarked image | Original watermark | Extracted watermark | PSNR |
| Lena | | | | | 79.59 |
| Baboon | | | | | 76.87 |
| Barbara | | | | | 78.46 |
| Peppers | | | | | 77.76 |
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