Color Image Encryption Based on Deep Learning and Block Embedding

Table 2

Correlation coefficients of the encrypted Lena image for different methods.

Method	Direction
	Components	Horizontal	Vertical	Diagonal
Plain image	R	0.9724	0.9429	0.9241
	G	0.9727	0.9468	0.9250
	B	0.9463	0.9012	0.8638
Proposed	R	−0.0046	0.0072	0.0009
	G	−0.0015	0.0056	−0.0125
	B	−0.0091	−0.0076	−0.0145
Ref. [10]	R	0.0064	0.0160	−0.0026
	G	0.0009	0.0034	0.0125
	B	0.0091	−0.0045	−0.0090
Ref. [18]	R	−0.0112	−0.0026	0.0052
	G	0.0050	0.0199	−0.0064
	B	−0.0179	0.0120	−0.0161
Ref. [19]	R	0.0014	0.0048	0.0002
	G	0.0033	−0.0006	0.0048
	B	0.0021	0.0002	−0.0040
Ref. [20]	R	−0.0070	0.0049	−0.0083
	G	−0.0076	0.0062	0.0032
	B	0.0047	−0.0025	−0.0058