Ultrasound Image Enhancement Using Structure-Based Filtering

Table 2

PSNR 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	25.7	32.4	31.8	31.0	29.7	30.6	27.4	28.6
𝜎=0.2	19.8	27.2	29.6	29.8	28.5	19.9	24.2	27.3
𝜎=0.3	16.6	26.2	27.7	27.9	26.9	16.6	21.6	26.0
𝜎=0.4	14.3	24.1	26.1	26.6	25.4	14.3	19.6	24.8
𝜎=0.5	12.8	22.0	24.4	25.1	24.0	12.8	18.1	23.8
Butterfly
𝜎=0.1	24.5	32.5	31.9	30.0	30.9	30.8	24.9	28.3
𝜎=0.2	18.7	26.1	28.1	28.0	28.0	18.7	22.5	26.9
𝜎=0.3	15.4	25.2	26.6	26.9	26.9	15.4	20.2	25.3
𝜎=0.4	13.3	22.4	24.8	25.0	24.9	13.2	18.3	23.9
𝜎=0.5	11.8	20.4	22.9	23.8	23.3	11.8	16.8	22.7
Peppers
𝜎=0.1	25.9	29.5	29.3	28.9	27.7	28.8	26.5	28.1
𝜎=0.2	20.0	26.5	28.1	28.2	26.9	20.1	23.9	27.0
𝜎=0.3	16.8	26.0	27.0	27.1	26.0	16.8	21.6	25.9
𝜎=0.4	14.6	24.2	25.7	26.0	24.8	14.6	19.6	24.7
𝜎=0.5	13.0	22.8	24.6	25.1	23.7	13.0	18.1	23.8
Cameraman
𝜎=0.1	25.6	26.7	26.3	25.8	24.8	28.7	24.0	24.0
𝜎=0.2	19.7	24.3	24.3	24.1	24.4	19.7	22.3	23.5
𝜎=0.3	16.4	23.4	23.7	23.7	23.5	16.4	20.4	22.9
𝜎=0.4	14.3	22.5	23.1	23.1	23.0	14.3	18.7	22.1
𝜎=0.5	12.8	21.6	22.3	22.4	22.2	12.8	17.4	21.4