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Table 2 PSNRs of periodic vs. uniform periodic block matching

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

Input Peak PSNR [dB]   np- π N8 np- π U8   np- π N16 np- π U16
Silicon 6 3.62   21.65 22.14   23.39 23.80
Silicon 9 6.65   23.92 24.21   26.15 26.21
Silicon 11 9.63   24.02 24.19   26.00 25.62
Silicon 18 12.58   26.74 26.79   27.99 28.02
Silicon 21 15.12   27.74 27.81   28.76 28.75
Silicon 21 13.64   27.80 27.94   28.86 28.89
Silicon 34 16.68   29.53 29.56   30.25 30.28
Silicon 88 22.75   31.56 31.68   31.80 31.94
Silicon 88 22.88   31.74 31.84   31.99 32.15
Gallium nitride 7 6.11   23.26 23.78   24.76 24.82
Gallium nitride 12 10.15   26.13 26.49   27.90 27.99
Gallium nitride 17 13.25   27.86 28.09   29.04 28.99
Gallium nitride 95 23.23   33.58 33.48   33.89 33.58
Silicon (disloc.) 6 2.70   18.47 19.53   17.16 19.50
Silicon (disloc.) 11 9.72   24.39 24.88   26.64 26.55
Silicon (disloc.) 15 12.73   26.34 26.50   27.65 27.44
Silicon (disloc.) 49 19.81   29.94 29.87   30.20 30.14
Silicon (disloc.) 89 22.66   31.48 31.48   31.77 31.75
Silicon (disloc.) 92 22.73   31.39 31.44   31.67 31.67
  1. Adaptive periodic (np- π N) and uniform adaptive periodic (np- π U) block matching with block sizes n =8 (middle columns) and n =16 (right columns). The best result within each row and the corresponding columns (separated by wide space) is in bold face.