A Novel Image Encryption Algorithm Based on the Delayed Maps and Permutation-Confusion-Diffusion Architecture

Table 3

Correlation coefficients between two adjacent pixels in different images.

Image name	Original image			Encrypted image
	Horizontal	Diagonal	Vertical	Horizontal	Diagonal	Vertical
Lena	0.9460	0.9321	0.9725	0.0013	0.0002	0.0033
Peppers	0.9639	0.9414	0.9709	0.0021	−0.0024	0.0009
Boats	0.9370	0.9040	0.9571	0.0043	0.0017	0.0031
Man	0.9405	0.9133	0.9540	−0.0022	−0.0011	−0.0029