Table 4.

Comparison of quantitative results of crack detection (handheld laser).

Evaluation Index	Crack	2D Only	3D Only	2D and 3D
P (%)	1	58.5	98.4	97.3
	2	44.6	81.6	77.7
	3	38.7	90.6	90.5
R (%)	1	99.4	88.5	91.3
	2	87.2	74.3	82.4
	3	80.8	68.1	81.2
F1 (%)	1	73.6	93.2	94.2
	2	59.0	77.8	80.0
	3	52.4	77.7	85.6