On the Cryptanalysis of a Bit-Level Image Chaotic Encryption Algorithm

Table 5

The mean NPCR and UACI of some encrypted images.

Image	NPCR (%)			UACI (%)
	R	G	B	R	G	B
Lena	99.6124	99.6277	99.6399	33.5715	33.3356	33.4044
Flower	99.5682	99.6384	99.617	33.5319	33.5063	33.4894
Greens	99.6201	99.6246	99.6231	33.4527	33.4685	33.515
Koala	99.6201	99.6002	99.585	33.5346	33.4637	33.3583
Back	99.6811	99.6368	99.617	33.4485	33.3744	33.5597
Leaf	99.6414	99.6048	99.6048	33.5595	33.6032	33.5455
Bird	99.5956	99.6246	99.559	33.2906	33.4532	33.2876
Cup	99.6338	99.5956	99.6124	33.3025	33.4557	33.4035