Research Article
Fractals and Independent Component Analysis for Defect Detection in Bridge Decks
Table 1
Actual and estimated horizontal location of defects in the 15 cm slab*.
| Scan | Actual location | Estimated location | Diff |
| Scan 2 | 85.73 | 87.07 | 1.34 |
| Scan 5 | 22.23 | 22.12 | 0.11 | 73.03 | 74.14 | 1.11 |
| Scan 6 | 8.89 | 9.73 | 0.84 |
| Scan 7 | 8.89 | 10.11 | 1.22 | 16.51 | 17.15 | 0.64 |
| Scan 9 | 27.31 | 24.46 | 2.85 |
| Scan 10 | 8.26 | 6.96 | 1.30 | 28.58 | 26.59 | 1.99 |
| Scan 11 | 9.53 | 8.76 | 0.77 | 48.26 | 44.73 | 3.53 |
| Scan 13 | 36.83 | ND | ND |
| Scan 14 | 49.53 | 54.89 | 5.36 | 81.28 | 83.21 | 1.93 |
| Average | | | 1.77 |
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*All measurements are in cm; ND means the defective segment is not detected.
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