Research Article
Secure Image Authentication Scheme Using Double Random-Phase Encoding and Compressive Sensing
Table 3
Correlation coefficients between adjacent pixels.
| Image | Original image | Encrypted image | Horizontal | Vertical | Diagonal | Horizontal | Vertical | Diagonal |
| Camera | 0.9334 | 0.9592 | 0.9086 | 0.0032 | −0.0007 | 0.0005 | Lena | 0.9458 | 0.9720 | 0.9211 | −0.0025 | 0.0058 | −0.0075 | Baboon | 0.8733 | 0.8273 | 0.7854 | 0.0054 | 0.0038 | 0.0000 | Peppers | 0.9610 | 0.9670 | 0.9296 | 0.0057 | −0.0020 | 0.0028 |
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