Table 4.

Correlation coefficients of two adjacent pixels of the cipher image for the proposed algorithm at $a=2,b=0.5,c=0.5,x_{1,0}=0.11,x_{2,0}=0.12$, and $k=0.87$ and other algorithms.

Image		Cipher Image
		Proposed	[6]			[1]	[21]	[22]
			Case I	Case II	Case III
	H	0.0005	0.0122	0.0075	−0.0038	0.0077	-	−0.0230
lena	V	0.0017	−0.0456	−0.0079	0.0093	0.0168	-	0.0019
($256\times 256$)	D	−0.0025	−0.0188	−0.0093	−0.0189	0.0104	-	−0.0034