Improved Chaos-Based Cryptosystem for Medical Image Encryption and Decryption

Table 7

ρ values of the original image and its corresponding encrypted image.

Image	Direction	Original image			Encrypted image
		Red	Blue	Green	Red	Blue	Green
Lena; (512 × 512 × 3)	H	0.9588	0.9358	0.9160	−0.0196	−0.0145	−0.0546
	V	0.9818	0.9665	0.9522	−0.0162	−0.0184	−0.0082
	D	0.9900	0.9810	0.9737	−0.0078	−0.0012	−0.0049
Peppers; (512 × 512 × 3)	H	0.9617	0.9658	0.9443	−0.0136	−0.0070	−0.0014
	V	0.9814	0.9789	0.9671	−0.0288	−0.0054	0.0046
	D	0.9666	0.9655	0.9455	−0.0310	−0.0294	0.0084
Baboon; (512 × 512 × 3)	H	0.8656	0.9291	0.8399	0.0053	0.0063	−0.0040
	V	0.7897	0.8848	0.7629	0.0020	0.0076	0.0098
	D	0.8855	0.9309	0.8619	0.0077	0.0049	−0.0075
3D ultrasound baby; (2844 × 4044 × 3)	H	0.8989	0.9008	0.8360	−0.0022	−0.0024	−0.0020
	V	0.9720	0.9723	0.9559	−0.0056	−0.0090	−0.0013
	D	0.9789	0.9815	0.9662	−0.0019	−0.0082	−0.0002
3D scanner ankle; (1080 × 1920 × 3)	H	0.9981	0.9983	0.9963	−0.0073	−0.0187	−0.0100
	V	0.9975	0.9984	0.9956	−0.0319	−0.0259	−0.0061
	D	0.9993	0.9992	0.9984	−0.0024	−0.0051	−0.0179
3D radiography; (2400 × 2956 × 3)	H	0.9993	0.9994	0.9994	−0.0022	−0.0018	−0.0007
	V	0.9989	0.9916	0.9945	−0.0029	−0.0036	−0.0032
	D	0.9946	0.9944	0.9901	−0.0015	−0.0019	−0.0002
3D X-ray; (3816 × 2832 × 3)	H	0.9981	0.9971	0.9955	−0.0241	−0.0051	−0.0164
	V	0.9995	0.9990	0.9986	−0.0071	−0.0034	−0.0180
	D	0.9995	0.9990	0.9987	−0.0043	−0.0108	−0.0336
3D CT-scan; (800 × 600 × 3)	H	0.9946	0.9944	0.9901	−0.0018	−0.0066	−0.0011
	V	0.9946	0.9944	0.9891	−0.0012	−0.0033	−0.0039
	D	0.9944	0.9941	0.9897	−0.0046	−0.0018	−0.0026
1D ultrasound; (1200 × 700 × 1)	H	0.9865			−0.00012
	V	0.9843			−0.00084
	D	0.9839			−0.00069
MRI; (456 × 456 × 1)	H	0.9144			−0.0022
	V	0.9346			−0.0041
	D	0.99422			−0.0019
Endoscopy; (634 × 549 × 1)	H	0.9882			−0.0260
	V	0.9869			−0.0022
	D	0.9847			−0.0047