Image Encryption with Double Spiral Scans and Chaotic Maps

Table 5

Comparison results of NPCR and UACI (unit: %).

Algorithm	Image	(1, 1)	(128, 128)	(360, 360)	(512, 512)
		NPCR/UACI	NPCR/UACI	NPCR/UACI	NPCR/UACI
Our	Lake	99.61/33.42	99.60/33.37	99.61/33.37	99.61/33.37
	Goldhill	99.61/33.75	99.61/33.48	99.62/33.75	99.62/33.71
	Lena	99.63/33.47	99.60/33.39	99.62/33.39	99.60/33.39
[6]	Lake	99.52/34.40	99.51/34.41	99.51/34.41	99.51/34.41
	Goldhill	99.56/34.31	99.59/34.36	99.59/34.36	99.56/34.36
	Lena	99.54/34.67	99.55/34.64	99.54/34.68	99.54/34.66
[31]	Lake	99.61/33.48	99.60/33.53	99.59/33.55	99.61/33.48
	Goldhill	99.60/33.53	99.58/33.52	99.60/33.55	99.61/33.49
	Lena	99.61/33.51	99.60/33.48	99.60/33.61	99.58/33.58