Color Image Scrambling Technique Based on Transposition of Pixels between RGB Channels Using Knight’s Moving Rules and Digital Chaotic Map

Table 1

Adjacent pixels’ correlation coefficients’ analysis.

Pixels’ adjacency	Image status	Color channel	Test images
			Lena	Peppers	Baboon
Horizontally	Original	R	0.9785	0.9677	0.8722
		G	0.9747	0.9815	0.7743
		B	0.9695	0.9661	0.8857
	Scrambled	R	0.0063	0.0009	0.0011
		G	0.0110	0.0044	−0.0009
		B	0.0104	0.0012	0.0015
Vertically	Original	R	0.9899	0.9695	0.9241
		G	0.9877	0.9831	0.8680
		B	0.9842	0.9696	0.9088
	Scrambled	R	0.0004	−0.0017	0.0002
		G	−0.0064	−0.0022	0.0032
		B	0.0003	−0.0020	0.0004
Diagonally	Original	R	0.9685	0.9565	0.8624
		G	0.9622	0.9719	0.7441
		B	0.9533	0.9527	0.8420
	Scrambled	R	−0.0020	0.0071	−0.0013
		G	0.0166	0.0007	0.0016
		B	0.0049	0.0035	−0.0007