Image Encryption Scheme Based on Block Scrambling, Closed-Loop Diffusion, and DNA Molecular Mutation

Table 6

Correlation coefficients of plaintext images and ciphertext ones.

Test image	Plaintext image			Ciphertext image
	HD	VD	DD	HD	VD	DD
Bridge	0.8491	0.8869	0.8187	0.0026	0.0029	–0.0009
Elaine	0.9576	0.9483	0.9316	–0.0010	–0.0008	–0.0036
Bird	0.9908	0.9811	0.9711	0.0000	0.0035	0.0000
Couple	0.9439	0.9424	0.9150	–0.0015	–0.0016	–0.0004
Camera	0.9615	0.9321	0.9058	0.0002	–0.0018	0.0003
Peppers	0.9535	0.9439	0.8988	0.0021	0.0014	0.0002