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

Table 3

Average of NC for “S” coefficients in first and second level of SVD for 18 images 256256.

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
	0.9968	0.9980	0.9866	0.9976	0.9868	1	0.9867	0.9865	0.9871
	0.9646	0.9878	0.9569	0.9952	0.9668	0.9994	0.9644	0.9580	0.9804