Blind Source Parameters for Performance Evaluation of Despeckling Filters

Table 1

Overview of despeckling methods and quality metrics computed by various researchers.

Reference	Types of filters	Number of filters	Performance parameters	Type of image	β/SMPI/SSI?
[1]	WLT, SAR, AD, GEO	15	FoM, SSIM, MSE, CNR, SNR	Heart US	No
[4]	LA, AD, MR, NLM, HYB	11	PSNR, MSE, SSIM, FoM	Breast US	No
[5]	DsF filters based on LS, WNR, MED, AD, GEO, HYBMED	10	MSE, SNR, PSNR, RMSE, QI, SSIM, AD, SC, NCC, MD, LMSE, NAE, Err	Carotid artery US	No
[3]	MED, AD, WLT, WNR, AVG, HYB	7	PSNR	Bone fracture	No
[10]	WLT, AMED, AD, MAP, FF, LLS	7	SNR, ENL, CNR, EKI, CPU time	OCT Retina	No
[21]	WLT, FF, NLM, TV, RNLA, HFF	17	PSNR, MSE, SNR, FoM, CoC, β, SSIM	Heart US	β
[12]	AMED, WNR, LS, MBR, AD, BS	17	PSNR, SNR, SSIM, FoM, EKI, MVR	Prostate US	No
[6]	MED, AMED, FIF, FBF, WLT, HFIF	10	β, MSE, SNR, PSNR	Kidney US	β
[7]	MED, Le-Sig, LR, Lee, Frost, MAP	07	SSI, EEI, FPI, IDPC	SAR image	β, SSI
[8]	Lee, Frost, MAP, WLT, BM3D, PPB	07	ENL, SSI, SMPI, CoC, ESI	SAR image	Yes
This paper	WLT, MR, FF, NLM, DsF, AD, BLT, TV, GEO, SAR, FIF (eleven types)	45	18 parameters along with visual quality assessment and clinical validation	TTE images	Yes

WLT: wavelet; LA: local adaptive; US: ultrasound; GEO: geometric; HYB: hybrid; MED: median; HYBMED: hybrid median; WNR: Wiener; LS: local statistics; MR: multiresolution; AMED: adaptive median; FF: fuzzy filters; HFF: hybrid fuzzy filters; LLS: linear least square; FIF: Fourier ideal filter; FBF: Fourier Butterworth filter; HFIF: homomorphic FIF; LR: local region; Le-Sig: Lee-Sigma; MAP: maximum a posteriori; DsF: despeckling filter; BLT: bilateral; FoM: figure of merit; CoC: correlation coefficient; SC: structural content; LMSE: Laplacian mean square error; MD: maximum difference; Err3 and Err4: normalized error summation; NAE: normalized average error; NCC: normalized cross-correlation; OCT: optical computed tomography; SAR: synthetic aperture radar; AVG: average; RNLA: Ripplet nonlinear approximation; MBR: M-band ridgelet; BS: BlockShrink; PPB: probabilistic patch based; MAP: maximum a priori.