A Color-Image Encryption Scheme Using a 2D Chaotic System and DNA Coding

Table 4

Correlation coefficients for original images and encrypted images.

Image name	Correlation for original image			Correlation for encrypted image
	Horizontal	Vertical	Diagonal	Horizontal	Vertical	Diagonal
Airplane	0.96519	0.96099	0.93251	−0.00342	−0.00166	−0.00200
Baboon	0.92306	0.86595	0.85434	0.00266	−0.00242	−0.00250
Lena	0.97977	0.98931	0.96969	−0.00462	−0.00219	0.00201
Fruits	0.97260	0.97282	0.95225	0.00085	0.02700	−0.00509
Sailboat	0.95345	0.94605	0.92842	0.00109	0.00095	0.00130
Tree	0.96523	0.93955	0.92920	0.00144	−0.02213	−0.00419
Female	0.96279	0.98352	0.94419	−0.01329	0.00742	−0.00797
Jelly beans	0.97508	0.97863	0.95434	0.00287	0.01505	0.01359
House	0.95879	0.95913	0.92809	−0.01392	0.01166	−0.01338
Splash	0.99244	0.99398	0.98394	0.00230	0.02391	−0.02812
ucid00010	0.93665	0.94358	0.91250	−0.00403	−0.01216	0.00710
ucid00031	0.93081	0.95766	0.89533	0.00513	0.01206	−0.00590
ucid00182	0.94613	0.95460	0.92325	−0.02825	−0.00029	0.00553
ucid00338	0.97560	0.96944	0.95529	0.00681	−0.00466	−0.00789
ucid00463	0.96898	0.95896	0.94815	−0.00237	0.01745	−0.01583
ucid00487	0.98196	0.96627	0.94867	−0.00855	−0.00753	−0.00561
ucid00586	0.99514	0.98904	0.98802	0.01080	0.01380	−0.00716
ucid00598	0.98456	0.98680	0.96843	−0.00744	0.03222	0.01098
ucid00779	0.87867	0.87094	0.80665	0.00116	0.00311	−0.02112
ucid00885	0.93089	0.95192	0.90514	−0.00623	−0.01098	0.01196