Ultrasound Image Enhancement Using Structure-Based Filtering

Table 3

SSIM of the noisy images and the denoised images by using different filters.

Images	Noisy image	Proposed method			Other filters
		Pass 1	Pass 2	Pass 3	Gauss	AWMF	DM	Median
Lena
𝜎=0.1	0.8111	0.9238	0.9255	0.9128	0.9184	0.9088	0.8976	0.8798
𝜎=0.2	0.6158	0.7498	0.8309	0.8631	0.8243	0.6221	0.7970	0.8189
𝜎=0.3	0.4900	0.5964	0.8006	0.8194	0.7294	0.4902	0.7019	0.7496
𝜎=0.4	0.4033	0.4868	0.7309	0.7730	0.6508	0.4033	0.6271	0.6819
𝜎=0.5	0.3538	0.4166	0.6543	0.7071	0.5899	0.3458	0.5678	0.6237
Butterfly
𝜎=0.1	0.7312	0.9425	0.9511	0.9448	0.9289	0.8858	0.8888	0.9214
𝜎=0.2	0.5041	0.8502	0.8913	0.8975	0.8197	0.5047	0.7749	0.8376
𝜎=0.3	0.3909	0.7214	0.7931	0.8194	0.7112	0.3909	0.6633	0.7389
𝜎=0.4	0.3270	0.5988	0.6751	0.7060	0.6220	0.3270	0.5735	0.6491
𝜎=0.5	0.2877	0.5065	0.5780	0.6724	0.5573	0.2877	0.5116	0.5735
Peppers
𝜎=0.1	0.8353	0.9103	0.9091	0.9012	0.9128	0.8930	0.8842	0.8895
𝜎=0.2	0.6369	0.8074	0.8676	0.8802	0.8467	0.6397	0.8150	0.8404
𝜎=0.3	0.5044	0.7181	0.7822	0.8034	0.7734	0.5045	0.7383	0.7804
𝜎=0.4	0.4141	0.6505	0.7317	0.7800	0.7208	0.4142	0.6671	0.7166
𝜎=0.5	0.3556	0.6479	0.7237	0.7522	0.6463	0.3556	0.6111	0.6646
Cameraman
𝜎=0.1	0.7891	0.8494	0.8342	0.8187	0.8567	0.8575	0.8142	0.7885
𝜎=0.2	0.6117	0.7006	0.7442	0.7619	0.7525	0.6102	0.7096	0.7236
𝜎=0.3	0.5162	0.6741	0.7166	0.7301	0.6965	0.5160	0.6348	0.6536
𝜎=0.4	0.4555	0.6135	0.6594	0.6784	0.6412	0.4556	0.5724	0.5933
𝜎=0.5	0.4084	0.5568	0.6020	0.6212	0.6212	0.4084	0.5246	0.5370