Fractals and Independent Component Analysis for Defect Detection in Bridge Decks

Table 3

Actual and estimated depth of defects in the 15 cm slab*.

Scan	Actual depth	Estimated depth	Diff
Scan 2	3.61	4.78	1.17
Scan 5	2.54	2.98	0.44
	5.08	6.35	1.27
Scan 6	1	0.47	0.53
Scan 7	2.54	3.14	0.6
	3.81	4.41	0.6
Scan 9	1	1.53	0.53
Scan 10	2.54	1.95	0.59
	1	0.89	0.11
Scan 11	3.81	4.34	0.53
	2.54	2.41	0.13
Scan 13	5.08	ND	ND
Scan 14	5.08	4.13	0.95
	3.61	3.73	0.12
Average			0.58

*All measurements are in cm; ND means the defective segment is not detected.