Table 1 Metrics obtained when applying denoising methods to the image with low-level of speckle noise

The source image

1766.6

50.32

15.66

0.4679

Bilateral filter

388.63

57.01

22.24

0.7465

KSVD

1046.8

52.70

17.93

0.8208

NLM

1046.2

52.70

17.93

0.8056

Fourier ideal filtering

849.51

53.61

18.84

0.5818

Fourier Butterworth

810.66

53.81

19.04

0.6451

Median filter

741.61

54.20

19.43

0.6678

Wavelet filter

1039.7

52.73

17.96

0.5604

BM3DPCA

936.26

53.19

18.42

0.8359

PGPCA

457.91

56.29

21.52

0.8415

LPGPCA

723.43

54.31

19.54

0.8405

MR-GND-PCA

298.77

58.04

23.38

0.8452