Entropy-Based Block Scrambling Image Encryption Using DES Structure and Chaotic Systems

Table 5

NPCR and UACI.

Schemes	Images	NPCR (%)	UACI (%)
This study	Lena	99.5987	33.5501
	Cameraman	99.6231	33.5269
	Fingerprint	99.6597	33.5613
Ref. [34]	Lena	99.6521	33.3438
	Cameraman	99.6292	33.4140
Ref. [37]	Lena	99.58	33.08
	Cameraman	99.60	33.15
Ref. [38]	Lena	99.6078	28.6203