Image Encryption Performance Evaluation Based on Poker Test

Table 4

The evaluation results of Figure 3 by normalized autocorrelation on different directions.

Iteration	Horizontal	Vertical	Diagonal
1	0.77962	0.729447	0.865807
2	0.57696	0.423958	0.706407
3	0.214836	0.064253	0.415315
4	0.026138	−0.06878	0.062199
5	−0.04489	−0.00844	−0.06562
6	−0.03496	0.026926	−0.00918
7	0.01608	0.364424	0.025746
8	0.101325	0.091398	0.349932
9	0.024626	−0.06663	0.094174
10	−0.04724	−0.00661	−0.06211
11	−0.01579	0.018661	−0.00866
12	0.080648	0.25252	0.01943
13	0.419839	0.577335	0.243791
14	0.672049	0.819787	0.55581