A hybrid NSCT domain image watermarking scheme

EURASIP Journal on Image and Video Processing

Table 6 Normalized Hamming similarity results for median filter attack

Image	Scheme	Mask 3×3	Mask 5×5	Mask 7×7	Mask 9×9
Lenna	Proposed	0.8579	0.7959	0.7729	0.7529
	Li [27]	0.7681	0.7448	0.7245	0.6999
	Patra [7]	0.8137	0.7236	0.6836	0.6563
	Duman [11]	0.6299	0.5283	0.5723	0.4834
Aerial	Proposed	0.7332	0.7196	0.7122	0.6696
	Li [27]	0.6560	0.6105	0.5950	0.6244
	Patra [7]	0.7339	0.6494	0.6104	0.5967
	Duman [11]	0.6084	0.5557	0.5146	0.5000
Airfield	Proposed	0.7141	0.7393	0.6986	0.6395
	Li [27]	0.6725	0.6418	0.6334	0.5982
	Patra [7]	0.7451	0.6702	0.6323	0.6240
	Duman [11]	0.5322	0.5039	0.5088	0.4883
Lake	Proposed	0.8269	0.8440	0.7620	0.7258
	Li [27]	0.7607	0.7487	0.7048	0.6977
	Patra [7]	0.7651	0.6763	0.6460	0.6296
	Duman [11]	0.4883	0.4590	0.5195	0.5449
Goldhill	Proposed	0.7817	0.7455	0.6983	0.6531
	Li [27]	0.7041	0.6838	0.6977	0.6983
	Patra [7]	0.7815	0.6934	0.6565	0.6313
	Duman [11]	0.5967	0.5449	0.5518	0.5010
Barbara	Proposed	0.7813	0.7710	0.7329	0.6860
	Li [27]	0.7552	0.7455	0.7284	0.7109
	Patra [7]	0.7695	0.6875	0.6477	0.6284
	Duman [11]	0.6152	0.5205	0.5068	0.5254
Baboon	Proposed	0.7590	0.7758	0.7116	0.6130
	Li [27]	0.6457	0.6250	0.6118	0.6098
	Patra [7]	0.6765	0.6094	0.5894	0.5691
	Duman [11]	0.5234	0.5215	0.5205	0.5469
Elaine	Proposed	0.6718	0.6570	0.6557	0.7209
	Li [27]	0.7464	0.7016	0.6815	0.6463
	Patra [7]	0.7917	0.7200	0.6736	0.6406
	Duman [11]	0.5029	0.5000	0.5547	0.5039
Peppers	Proposed	0.8023	0.8207	0.8401	0.8130
	Li [27]	0.7904	0.7859	0.7642	0.7452
	Patra [7]	0.8025	0.7141	0.6726	0.6416
	Duman [11]	0.6143	0.4219	0.4697	0.4951