Table 1.

Crack locating accuracy comparison (the best results are marked in bold).

Test Images	Method	Acc (%)	Recall	Precision
No. 1	STRUM+AdaBoost	99.05	24.87	83.19
	Block-wise CNN	93.87	86.97	14.73
	LPP	99.67	84.17	73.38
No. 2	STRUM+AdaBoost	97.91	13.61	78.42
	Block-wise CNN	95.48	58.59	27.56
	LPP	99.52	78.83	79.86
No. 3	STRUM+AdaBoost	96.64	14.75	48.03
	Block-wise CNN	90.88	56.90	15.94
	LPP	99.15	83.15	49.20
No. 4	STRUM+AdaBoost	99.38	3.24	25.00
	Block-wise CNN	97.17	30.01	6.81
	LPP	99.90	74.78	82.89
No. 5	STRUM+AdaBoost	97.08	8.20	20.13
	Block-wise CNN	93.67	93.42	26.22
	LPP	99.64	89.99	95.17