Image Encryption Technique Combining Compressive Sensing with Double Random-Phase Encoding

Table 2

Correlation coefficients of adjacent pixels.

Algorithm	Image	Horizontal	Vertical	Diagonal
	Lena	0.9663	0.9491	0.9250
Proposed algorithm [21]	Encrypted Lena	0.0005	−0.0013	−0.0011
	Encrypted Lena	0.0198	0.0141	0.0026
	Cameraman	0.9592	0.9227	0.9272
Proposed algorithm [21]	Encrypted Cameraman	0.0017	0.0021	−0.0038
	Encrypted Cameraman	0.0128	0.0061	0.0057