Table 6 Local damage status data of bridge arches.
From: A crack detection and quantification method using matched filter and photograph reconstruction
Order number | Image size | Length per pixel/mm | Shooting distance/mm | Focus/mm | Total length/mm | The length of the fracture in the unit area mm/cm2 |
|---|---|---|---|---|---|---|
a | 800x800 | 0.258 | 1000 | 12.7042 | 1797.0 | 4.2 |
b | 800x800 | 0.258 | 1000 | 12.7042 | 789.7 | 1.8 |
c | 500x500 | 0.258 | 1000 | 12.7042 | 160.5 | 1.0 |
d | 400x400 | 0.258 | 1000 | 12.7042 | 268.1 | 2.5 |
e | 500x500 | 0.258 | 1000 | 12.7042 | 393.5 | 2.3 |
f | 479x479 | 0.258 | 1000 | 12.7042 | 355.1 | 2.3 |
