An Improvement Technique Based on Structural Similarity Thresholding for Digital Watermarking

Table 2

Watermark imperceptibility and algorithm complexity for various threshold (thr2) values.

	Thr2 = 0.6		Thr2 = 0.7		Thr2 = 0.8		Thr2 = 0.9
	MSE	SSIM	MSE	SSIM	MSE	SSIM	MSE	SSIM
LSB	28.22	0.91	12.39	0.94	0.03	0.98	0.01	1
DCT-based [12]	37.78	0.88	14.18	0.93	0.5	0.96	0.13	1
Wavelet-based [13]	39.39	0.87	23.96	0.92	16.48	0.95	1.43	0.99
CDMA-Wavelet [14]	36.36	0.89	14.07	0.94	9.13	0.97	0.71	1