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Table 8 Performance of median and Wiener filters

From: Poisson noise removal from high-resolution STEM images based on periodic block matching

 

Input

Peak

Dose [C/cm 2 ]

ρ +

ρ

Precision [pm]

Fidelity [pm]

Median

Silicon

6

0.7853

0.96

0.81

38.73

2.86

 

Gallium nitride

7

1.5400

1

0

19.01

1.36

 

Silicon

9

1.5706

0.83

0.06

29.81

2.46

 

Gallium nitride

12

3.8499

1

0

12.07

0.74

Wiener

Silicon

6

0.7853

0.04

0.5

n/a

9.44

 

Gallium nitride

7

1.5400

0.19

0.06

n/a

14.69

 

Silicon

9

1.5706

0.02

0.67

n/a

12.81

 

Gallium nitride

12

3.8499

0

n/a

n/a

n/a

  1. Detection fraction (26), misdetection fraction (27), precision (28), and fidelity (29) (both in picometers) of denoised images after application of a median filter (top rows) and a low-pass Wiener filter (bottom rows).