Image Encryption Algorithm Based on the H-Fractal and Dynamic Self-Invertible Matrix

Table 3

The correlation coefficients in different directions.

Image	Original image			Cipher image
	Horizontal	Vertical	Diagonal	Horizontal	Vertical	Diagonal
Lena	0.9680	0.9349	0.9069	0.0078	0.0040	−0.0050
Cameraman	0.9467	0.9180	0.9054	−0.0019	−0.0051	0.0032
Peppers	0.9731	0.9664	0.9381	0.0051	0.0037	0.0014
Baboon	0.8327	0.8759	0.7890	−0.0065	−0.0038	0.0065