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

Table 1

Kurtosis of NSCT subband coefficients for various images.

Image	1	2	3	4	5	6	7	8
Barbara	19.26	13.8	12.83	16.92	17.77	40.95	16.76	17.8
Lena	38.67	22.92	29.68	48.1	34.34	32.24	52.5	36.86
Peppers	34.91	26.36	29.52	30.33	49.11	33.53	35.32	43.54