Table 2.

Performance verification of the proposed scheme for different number of color watermark insertion with watermark image size of 32 × 32

No. of Watermarks	Parameter	Img1	Img2	Img3	Img4	Img5	Img6	Img7	Img8	Img9	Img10
24	NC	0.997941	0.997928	0.997851	0.997923	0.997842	0.997857	0.99787	0.99781	0.99789	0.99791
	Q	0.998690	0.998844	0.998621	0.998721	0.998857	0.998798	0.99879	0.99876	0.99882	0.99864
	PSNR	45.98547	45.98451	45.98143	45.97991	45.98149	45.97995	45.98342	45.97362	45.97856	45.98149
	SNR	36.1479	35.99848	35.98551	36.41674	35.95718	36.43421	35.97845	35.98551	36.31628	35.96485
16	NC	0.998021	0.998752	0.998864	0.998064	0.998954	0.998038	0.99832	0.99828	0.99841	0.99865
	Q	0.999047	0.999159	0.999138	0.999058	0.999178	0.999177	0.99923	0.99919	0.99921	0.99915
	PSNR	47.75425	47.65251	47.74841	47.86587	47.45854	47.54789	47.66431	47.64876	47.86752	47.57431
	SNR	37.71864	38.16217	37.94785	37.87554	38.08713	37.97098	38.26235	37.94785	37.76526	38.29564
12	NC	0.998123	0.998764	0.998897	0.998342	0.998970	0.998351	0.99854	0.99849	0.99866	0.99875
	Q	0.999221	0.999319	0.999398	0.999433	0.999598	0.999391	0.99953	0.99949	0.99956	0.99932
	PSNR	48.83774	48.91647	48.89631	48.86657	48.97125	48.88963	48.45291	48.89872	48.96657	48.98325
	SNR	38.92147	39.75821	38.96587	38.95487	39.87417	38.97546	39.65832	38.96587	38.85349	39.94426
8	NC	0.998467	0.998841	0.998943	0.998687	0.999012	0.998558	0.99879	0.99876	0.99883	0.99886
	Q	0.999358	0.999469	0.999447	0.999685	0.999686	0.999562	0.99981	0.99974	0.99986	0.99941
	PSNR	49.84613	49.92547	49.99647	49.97584	49.99527	49.97657	49.93657	49.89773	49.87685	49.99876
	SNR	40.06542	39.95462	40.03982	40.07589	40.64187	40.95647	39.87652	40.03982	40.12495	40.59874
6	NC	0.998765	0.998976	0.999011	0.998982	0.999238	0.998908	0.99897	0.99895	0.99898	0.99899
	Q	0.999498	0.999573	0.999561	0.999812	0.999801	0.999791	0.99985	0.99982	0.99989	0.99977
	PSNR	50.97882	51.03091	51.14586	51.07362	51.08758	51.07421	51.02159	51.24685	51.27451	51.15473
	SNR	41.07548	40.99854	41.04844	41.09532	41.75249	41.96214	40.97623	41.04844	41.29492	41.79526
4	NC	0.999036	0.999114	0.999719	0.999125	0.999421	0.999125	0.99909	0.99902	0.99923	0.99935
	Q	0.999534	0.999628	0.999712	0.999948	0.999972	0.999969	0.99997	0.99995	0.99996	0.99991
	PSNR	53.18975	53.40738	53.67553	53.58336	53.65627	53.59902	53.20743	53.57687	53.48643	53.75624
	SNR	43.12137	42.91684	43.09791	43.41576	43.89273	43.99755	42.90845	43.09791	43.31486	43.95423
2	NC	0.999798	0.999813	0.999892	0.999445	0.999681	0.999485	0.99944	0.99939	0.99962	0.99973
	Q	0.999983	0.999976	0.999969	0.999945	0.999981	0.999980	0.99998	0.99997	0.99998	0.99997
	PSNR	56.76161	56.92657	57.27539	57.06924	56.82357	56.98985	56.95649	57.27628	57.15844	56.92342
	SNR	46.78156	45.83358	45.99845	46.65178	47.05498	46.72421	45.75346	45.88567	46.51843	46.98743