Robust Watermarking Algorithm against the Geometric Attacks based on Non-Subsampled Shearlet Transform and Harris-Laplace Detector

Table 7

NC values of the existing schemes.

Attacks	Reference [23]	Reference [30]	Reference [27]	Proposed
	DST & BSVD	DWT & ASIFT	Harris-SURF & DCT	NSST & Harris-Laplace
JPEG compression (75%)	0.9921	0.9971	1.0000	0.9827
Gaussian low-pass filtering (0.5)	0.9883	0.9853	0.9563	0.9866
Gaussian noise (0.05)	0.9837	0.9293	0.9374	0.9666
Salt and pepper noise (0.05)	0.9815	0.9452	0.8816	0.9620
Quarter cutting	0.9025	0.8461	0.8745	0.9841
Rotation ()	0.9843	0.9608	0.8538	0.9870
Scaling (0.8)	0.9531	0.9963	0.9352	0.9860