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

Table 2

Average of NC for “S” coefficients in first and second level of SVD for 9 images 10241024.

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
	0.9702	0.9986	0.9704	0.9959	0.9704	1	0.9705	0.9703	0.9887
	0.9587	0.9875	0.9522	0.9935	0.9602	0.9984	0.9596	0.9555	0.9878