Research Article
Reversible Data Hiding with Pixel Prediction and Additive Homomorphism for Encrypted Image
Table 2
Results of entropy and correlation coefficient.
| Image | Entropy | Correlation coefficient |
| Lena | 7.9992 | −0.0003 | Airplane | 7.9993 | 0.0022 | Barbara | 7.9994 | 0.0005 | Baboon | 7.9993 | −0.0026 | Peppers | 7.9993 | 0.0007 | Boats | 7.9994 | −0.0002 | Man | 7.9993 | 0.0002 | Tiffany | 7.9993 | 0.0009 |
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