NSCT Domain Additive Watermark Detection Using RAO Hypothesis Test and Cauchy Distribution

Table 3

Visual quality for various images.

Image	Alpha	DWR	PSNR	Alpha	DWR	PSNR	Alpha	DWR	PSNR
Barbara	1.43	6	53.99	1.14	8	56.36	0.91	10	59.69
Lena	1.32	6	54.97	1.05	8	57.48	0.83	10	61.67
Peppers	1.26	6	55.14	1.00	8	58.14	0.80	10	62.38