Secure Image Authentication Scheme Using Double Random-Phase Encoding and Compressive Sensing

Table 4

Comparisons on mean correlation coefficients for various methods.

Direction	Mean correlation coefficients
	Ref. [41]	Ref. [42]	Ref. [43]	Ours
Horizontal	0.0124	0.0127	0.0132	0.0032
Vertical	0.0070	0.0117	0.0078	0.0025
Diagonal	0.0050	0.0235	0.0182	0.0031