A Robust Watermarking Scheme Based on the Mean Modulation of DWT Coefficients

Table 1

Quality of watermarked images using different insertion parameters ().

Message size	Transformation level	Watermarked Lena images			Watermarked Couple images			Watermarked Baboon images
256	l=1
	T	4.47	3.12	2.02	4.48	3.13	2.01	4.47	3.13	2.02
	PSNR	37.9943	40.999	44.9961	37.9902	40.9901	44.9993	37.9998	40.9945	44.9965
	SSIM	0.9231	0.9594	0.98329	0.95005	0.97394	0.98938	0.97439	0.98681	0.99468
	l=2
	T	9.09	6.39	4.01	9.09	6.43	4.02	9.08	6.41	4.01
	PSNR	37.9967	40.9958	44.9995	37.998	40.9941	44.9901	37.9971	40.997	44.9963
	SSIM	0.92872	0.96245	0.9846	0.95373	0.97585	0.99015	0.97628	0.98778	0.99507
	l=3
	T	17.38	12.28	7.64	17.45	12.25	7.61	17.48	12.2	7.59
	PSNR	37.9927	40.996	44.9935	37.9952	40.9955	44.9958	37.9923	40.9987	44.9991
	SSIM	0.955	0.97657	0.99024	0.97074	0.98497	0.99379	0.985	0.9924	0.99687
512	l=1
	T	4.47	3.13	2.02	4.47	3.13	2.01	4.46	3.13	2.01
	PSNR	37.9983	40.9968	44.996	37.9973	40.9991	44.9984	37.9992	40.9955	44.9952
	SSIM	0.92319	0.9594	0.98329	0.95006	0.97397	0.98936	0.97443	0.98681	0.99467
	l=2
	T	9.09	6.41	4.01	9.10	6.42	4.02	9.05	6.40	4.02
	PSNR	37.9985	40.9908	44.9998	37.9937	40.9946	44.9943	37.9965	40.9984	44.9921
	SSIM	0.9288	0.96241	0.98457	0.95359	0.97585	0.99017	0.97633	0.98777	0.99505
	l=3
	T	17.45	12.28	7.62	17.48	12.26	7.64	17.30	12.25	7.61
	PSNR	37.9979	40.9913	44.995	37.9982	40.999	44.9945	37.9974	40.9998	44.9975
	SSIM	0.95478	0.97642	0.99026	0.97061	0.98499	0.99377	0.98524	0.99239	0.99688
1024	l=1
	T	4.47	3.13	2.02	4.47	3.13	2.02	4.47	3.13	2.01
	PSNR	37.9984	40.9978	44.9951	37.9984	40.9933	44.9922	37.9969	40.9984	44.998
	SSIM	0.92325	0.9594	0.98329	0.95014	0.9739	0.98937	0.97441	0.98683	0.99467
	l=2
	T	9.082	6.4117	4.0237	9.10	6.42	4.02	9.08	6.40	4.02
	PSNR	37.9969	40.9961	44.999	37.9905	40.9962	44.9975	37.997	40.9995	44.9942
	SSIM	0.92885	0.96245	0.98456	0.95357	0.9759	0.99016	0.97628	0.98782	0.99506
	l=3
	T	17.40	12.26	7.60	17.44	12.30	7.64	17.35	12.23	7.62
	PSNR	37.9972	40.9987	44.9957	37.9993	40.9988	44.9974	37.9965	40.9997	44.999
	SSIM	0.95549	0.97656	0.99029	0.97078	0.98484	0.99375	0.98521	0.99244	0.99686