Table 9 Table of correlation coefficients for the ciphertext image.

From: An encryption algorithm for color images based on an improved dual-chaotic system combined with DNA encoding

Image

Channel

Horizontal

Vertical

Diagonal

Lena

R

0.014372

− 0.0097161

− 0.0039481

G

− 0.014635

0.00093243

− 0.0053342

B

0.019802

0.0066253

− 0.0074909

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