FPGA Implementation of Digital Images Watermarking System Based on Discrete Haar Wavelet Transform

Table 5

NC and PSNR values for watermarked, encrypted and attacked images by cropping.

Window size	PSNR				NC
	Cameraman	Mandrill	Lena	Pepper	Cameraman	Mandrill	Lena	Pepper
8×8]	38.88	42.05	38.73	40.96	0.988	0.952	0.980	0.746
16×16]	33.92	38.01	33.84	36.82	0.793	0.812	0.898	0.736
32×32]	28.17	31.51	28.16	28.77	0.759	0.780	0.766	0.698
64×64]	22.10	23.93	22.30	22.85	0.657	0.587	0.570	0.605
128×128]	15.70	17.94	18.09	18.09	0.452	0.406	0.388	0.410