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Table 1 Radiograph simulation parameters and noise factors

From: Detection, 3-D positioning, and sizing of small pore defects using digital radiography and tracking

Grouping Parameter Unit NF Fixed at NF low NF high
Pores Min interspacing mm   0.35   
  Count    8   
  Positions mm   Uniform random   
  Min to max radius mm     
Weld Plate thickness (T) mm   5   
  Width (B) DS mm Ψgeo   12 5 ± 1
  Reinforcement (δ0) DS mm Ψgeo   1.5 0.75 ± 0.2
  Undercut (δ1) DS mm Ψgeo   0.5 0.75 ± 0.2
  Width (B) SS mm Ψgeo   8 3 ± 0.4
  Reinforcement (δ0) SS mm Ψgeo   0.8 0.55 ± 0.2
  Undercut (δ1) SS mm Ψgeo   0.4 0.55 ± 0.2
Setup SDD mm   600   
  ODD mm   25   
  Rotation angle (ω) degrees   0,5,10,15,20,25   
  Rotation point (R x ) mm   567   
X-ray Attenuation mm-1   0.124   
  D   Ψcnr   110 160
  S   Ψcnr   6,000 12,000
  PSF width (σdet) pixel Ψdet   0.93 0.93 ± 0.08
  1. See Figure1 for details on weld and setup geometry. DS and SS refer to detector and source side, equivalent to face and root side. NF is shorthand for noise factor.