Crack-Depth Prediction in Steel Based on Cooling Rate

Table 1

Parameters for the geometric calibration of the IR camera NEC TH9260.

Focal length (mm)	14.35 ± 0.44
Format size (mm)	5.98 × 4.50 (±0.07)
Pixel size (mm)
Principal point () (mm)	2.99 ± 0.07
Principal point () (mm)	2.28 ± 0.09
Lens distortion