Host Feasibility Investigation to Improve Robustness in Hybrid DWT+SVD Based Image Watermarking Schemes

Table 1

Average NC for S coefficients in the first and second level of SVD for 33 images 512512.

Attacks	Gaussian 0.01	Gamma correction 0.1	AVG filter 33	Crop 1/4	S&P; 0.01	Scaling 1/2	Speckle 0.01	Median 33	Rot 50
	0.9877	0.9983	0.9881	0.9959	0.9880	1	0.9882	0.9880	0.9861
	0.9775	0.9899	0.9757	0.9929	0.9785	0.9992	0.9790	0.9771	0.9857