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

Table 4

The NPCRs, UACIs, and correlation coefficients of the images after the occlusion attack.

Occlusion	NPCR	UACI	Correlation coefficients
			Horizontal	Vertical	Diagonal
0	0	0	0.9680	0.9349	0.9069
1/256	3.5339	1.0733	0.8371	0.8222	0.7957
1/64	12.2253	3.6316	0.6419	0.6057	0.5811
1/16	35.9364	10.6799	0.2669	0.2516	0.2327