Digital Path Approach Despeckle Filter for Ultrasound Imaging and Video

Table 1

Comparison of the efficiency of the proposed filter and competitive methods using the PSNR and MSSIM quality measure on the static images.

File noise (σ^2)	Goldhill			Boats			Phantom			Fetus
	0.2	0.4	0.6	0.2	0.4	0.6	0.2	0.4	0.6
PSNR results (dB)
Noisy	31.52	19.69	13.25	30.65	18.75	12.62	35.05	23.03	16.48	22.46
Wiener	30.76	27.09	22.24	31.01	26.69	21.90	37.36	28.57	21.19	24.73
SRAD	30.73	27.26	23.69	32.06	26.96	23.98	42.52	30.82	24.14	18.62
NLM	34.06	27.35	16.49	35.40	27.68	15.54	43.07	30.31	20.15	27.27
OBNLM	30.87	28.24	24.43	32.61	28.06	24.13	38.64	30.34	23.76	18.78
PNLM	34.20	27.18	22.75	34.52	27.34	22.13	42.21	30.43	23.00	26.77
PPBF	32.80	27.11	18.56	32.64	26.91	20.00	37.01	29.50	21.15	25.93
DPAlast	32.83	27.77	24.96	32.61	27.10	24.20	44.98	34.65	26.63	26.69
EPF2D	33.63	27.98	25.24	33.48	27.49	24.21	48.57	37.60	27.32	27.34
MSSIM results
Noisy	0.83	0.32	0.11	0.75	0.30	0.13	0.86	0.57	0.47	0.39
Wiener	0.77	0.64	0.43	0.84	0.67	0.43	0.98	0.91	0.67	0.66
SRAD	0.88	0.67	0.54	0.92	0.72	0.65	0.99	0.96	0.89	0.86
NLM	0.88	0.65	0.20	0.93	0.69	0.25	0.99	0.95	0.56	0.90
OBNLM	0.90	0.69	0.56	0.93	0.69	0.63	1.00	0.93	0.79	0.84
PNLM	0.90	0.64	0.42	0.92	0.67	0.39	0.98	0.91	0.80	0.76
PPBF	0.86	0.69	0.35	0.88	0.74	0.53	0.95	0.89	0.68	0.87
DPAlast	0.87	0.69	0.59	0.89	0.73	0.59	0.99	0.95	0.88	0.85
EPF2D	0.90	0.70	0.59	0.90	0.74	0.61	1.00	0.95	0.93	0.90