A Robust Watermarking Scheme Based on Maximum Wavelet Coefficient Modification and Optimal Threshold Technique

Table 2

Embedding strength versus PSNR and SSIM.

	10	15	20	25	30	40	50	70	90
WTQ [14] (39.6 dB)	—	—	—	—	0.24	0.37	0.49	0.75	1
SDWCQ [26] (42.2 dB)	0.42	0.56	0.70	0.80	0.86	0.94	0.97	1	1
MWCQ [27] (41.5 dB)	0.35	0.52	0.69	0.81	0.85	0.92	0.95	0.96	0.99
SD-QIM [32] (43.3 dB)	0.39	0.72	0.91	0.96	0.98	0.99	1	1	1
Our method (42.2 dB)	0.61	0.84	0.96	0.99	0.99	1	1	1	1