Development of a Novel Hyperchaos-Based Image Encryption Algorithm Consisting of Two Scrambling-Diffusion Operations

Table 2

Correlation coefficients of selected adjacent pixels.

Algorithms	Images	Horizontal	Vertical	Diagonal
Present in this paper	Baboon (plain)	0.753386	0.864758	0.718634
Present in this paper	Lena (plain)	0.985316	0.977914	0.958496
Present in this paper	Airplane (plain)	0.970116	0.966374	0.940405
Present in this paper	Pepper (plain)	0.980926	0.975215	0.965311
Present in this paper	Baboon (encrypted)	0.011226	0.016652	0.004684
Present in this paper	Lena (encrypted)	0.016603	−0.007193	0.001036
Present in this paper	Airplane (encrypted)	0.014916	−0.000845	0.004081
Present in this paper	Pepper (encrypted)	0.010380	0.006469	−0.010354
[30]	Lena (encrypted)	−0.028872	0.014593	0.036587
[31]	Lena (encrypted)	−0.0285	0.0014	0.0013
[32]	Lena (encrypted)	0.0039	−0.0314	0.0158
[12]	Lena (encrypted)	0.011816	−0.017311	0.022785