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Table 1 PSNR (in dB) values for despeckling of the test image in Figure 4

From: Subspace-based technique for speckle noise reduction in ultrasound images

Noise variance

Noisy

Lee

Wavelet

SBF

SDC

0.02

20.61

19.88

21.66

21.68

21.73

0.04

18.98

19.73

20.56

20.49

20.60

0.06

16.80

19.46

18.18

19.05

19.84

0.08

14.61

18.96

15.61

18.23

19.11

0.10

11.69

18.07

12.26

17.81

17.67