Research Article
Image Encryption Based on High-Dimensional Manifold Computing and Block Dividing Algorithm
Table 2
Correlation coefficients between the original and cipher images.
| Plain/cipher image | Image | Correlation direction | Horizontal | Vertical | Diagonal |
| Plain image | Lena | 0.9849 | 0.9718 | 0.9570 | Baboon | 0.7574 | 0.8633 | 0.7293 | Airplane | 0.9648 | 0.9465 | 0.9722 | Couple | 0.9524 | 0.9155 | 0.9450 | Cipher image | Lena | 0.0068 | 0.0103 | 0.0044 | Baboon | 0.0148 | 0.0248 | 0.0061 | Airplane | 0.0069 | 0.0086 | 0.0133 | Couple | 0.0380 | 0.0041 | 0.0205 |
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