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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