Table 5 Algorithm error verification.
From: A crack detection and quantification method using matched filter and photograph reconstruction
Order number | Length per pixel/mm | Shooting distance/mm | Focus/mm | Pixel number of skeleton | Manual measurement results/mm | Algorithm calculation results/mm | Error/mm |
|---|---|---|---|---|---|---|---|
a | 0.297 | 1000 | 4.71 | 2413 | 703.4 | 716.7 | 13.3 |
b | 0.297 | 1000 | 4.71 | 2391 | 692.3 | 710.1 | 17.8 |
c | 0.297 | 1000 | 4.71 | 2317 | 674.5 | 688.1 | 13.6 |
d | 0.297 | 1000 | 4.71 | 2507 | 754.6 | 735.7 | 18.9 |
