Table 7 Correlation detection results for the cameraman picture
From: Periodic characteristics of the Josephus ring and its application in image scrambling
Correlation | Vertical | Horizontal | Diagonal |
|---|---|---|---|
Samples | |||
Plain image | 0.9565 | 0.9334 | 0.9564 |
Scrambled image | 0.2663 | 0.1844 | 0.2720 |
Directly CA-encrypted images | − 8.9832 × 10−4 | − 0.0055 | 0.0036 |
Scrambled and encrypted images | 2.4281 × 10−4 | 0.0027 | 0.0031 |