• Infrared and Laser Engineering
  • Vol. 49, Issue 7, 20190505 (2020)
Flowchart for solving coefficient vector βbest by TRR algorithm
Fig. 1. Flowchart for solving coefficient vector βbest by TRR algorithm
Schematic diagram of test specimen
Fig. 2. Schematic diagram of test specimen
Fitted background image with 10th frame thermographic data of the original thermal image sequence
Fig. 3. Fitted background image with 10th frame thermographic data of the original thermal image sequence
Comparison graph of image data in line 195 before and after TRR algorithm processing
Fig. 4. Comparison graph of image data in line 195 before and after TRR algorithm processing
Images of experimental results
Fig. 5. Images of experimental results
Results of defect segmentation
Fig. 6. Results of defect segmentation
CoefficientsValues
a6 448
b2.814
c1.256
d0.004 203
e−0.054 59
f−0.010 16
g−0.000 071 77
h0.000 191 7
i0.000 229 3
j−0.000 019 34
k−0.000 000 804 4
Table 1. Background fitting function coefficients of the 10th frame infrared image