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

Table 4

Correlation coefficients of the encrypted Lena image with different algorithms.

Direction	Original image	Our scheme	Ref. [44]	Ref. [45]	Ref. [46]
Horizontal	0.9582	0.0013	0.0090	0.0015	−0.0029
Diagonal	0.9266	0.0002	0.0041	−0.0005	−0.0001
Vertical	0.9566	0.0033	0.0024	0.0021	0.0012