Combining Haar Wavelet and Karhunen Loeve Transforms for Medical Images Watermarking

Table 3

PSNR, WPSNR, and Normalized Cross-Correlation for watermarked and attacked by Salt & Pepper noises.

Density	PSNR (dB)	WPSNR (dB)	NC
0.01	33.1542	46.4909	1.0000
0.02	30.9053	44.8789	1.0000
0.03	29.5090	43.8205	1.0000
0.04	28.7254	43.1368	1.0000
0.05	27.6397	42.1583	1.0000
0.06	26.9567	41.5865	1.0000
0.07	26.4402	41.0837	1.0000
0.08	25.9215	40.6158	0.9938
0.09	25.4346	40.1982	1.0000