Steganography Algorithm Based on the Nonlocal Maximum Likelihood Noise Estimation for Mobile Applications

Table 2

Correlation between the cover image and the stego-image.

Test	Round	Red color channel	Green color channel	Blue color channel	General
1	1	0.999782	0.999864	0.999894	0.999894
	2	0.999319	0.999509	0.999529	0.999452
	3	0.999782	0.999864	0.999894	0.999894
	4	0.999319	0.999509	0.999529	0.999452
2	1	0.999281	0.999628	0.999835	0.999581
	2	0.999727	0.999763	0.999721	0.999737
	3	0.999281	0.999628	0.999835	0.999581
	4	0.999727	0.999763	0.999721	0.999737
3	1	0.997414	0.996376	0.996962	0.996917
	2	0.998442	0.998682	0.998661	0.998595
	3	0.997414	0.996376	0.996962	0.996917
	4	0.998442	0.998682	0.998661	0.998595
4	1	0.994611	0.994202	0.995620	0.994811
	2	0.999071	0.998778	0.998276	0.998708
	3	0.994611	0.994202	0.995620	0.994811
	4	0.999071	0.998778	0.998276	0.998708
5	1	0.997158	0.997126	0.997914	0.997399
	2	0.997915	0.997978	0.997952	0.997948
	3	0.997158	0.997126	0.997914	0.997399
	4	0.997915	0.997978	0.997952	0.997948
6	1	0.997515	0.992386	0.965509	0.985137
	2	0.997548	0.993451	0.975926	0.988975
	3	0.997515	0.992386	0.965507	0.985136
	4	0.997548	0.993451	0.975927	0.988975
7	1	0.999924	0.999907	0.999853	0.999895
	2	0 .999936	0.999876	0.999809	0.999873
	3	0.999924	0.999907	0.999853	0.999895
	4	0 .999936	0.999876	0.999809	0.999873
8	1	0.996496	0.996155	0.992594	0.995082
	2	0.998677	0.997524	0.997884	0.998028
	3	0.996496	0.996155	0.992595	0.995082
	4	0.998677	0.997524	0.997884	0.998028
Average		0.998192	0.99757531	0.99474619	0.99687697