Table 7.

NPCR randomness test.

Tested Image Size 512 by 512	Theoretical NPCR Critical Value [45]
	$N_{0.05}^{*}=99.5893$	$N_{0.01}^{*}=99.5810$	$N_{0.001}^{*}=99.5717$
Our mean NPCR Value	NPCR Test Results
	0.05-level	0.01-level	0.001-level
99.6091	Pass	Pass	Pass