Table 6 Experimental data for 3D calibration accuracy assessment.
Camera angle | Core deviation pixel value p1 (pixel) | Corrected core deviation pixel value p2 (pixel) | Actual value of core deviation s1 (mm) | Actual value of core deviation after calibration s2 (mm) |
|---|---|---|---|---|
Vertical shot | 20.83 | 20.83 | 5 | 5 |
Near-vertical shooting | 19.76 | 20.34 | 4.74 | 4.88 |
Squint | 13.22 | 19.35 | 3.17 | 4.64 |
