Combining Haar Wavelet and Karhunen Loeve Transforms for Medical Images Watermarking

Table 4

PSNR, WPSNR, and Normalized Cross-Correlation for watermarked and attacked by Gaussian noise.

Variance	PSNR (dB)	WPSNR (dB)	NC
0.001	44.3893	31.2215	1.0000
0.002	42.7730	28.9659	1.0000
0.003	41.8008	27.4845	1.0000
0.004	40.9993	26.3917	1.0000
0.005	40.2247	25.4987	1.0000
0.006	39.6044	24.7603	1.0000
0.007	39.2108	24.1527	1.0000
0.008	38.7113	23.6068	1.0000
0.009	38.3282	23.1109	0.9959