Table 1.
Number of valid images scraped from the Internet.
| Class | Keywords | Valid Images/Total Images |
|---|---|---|
| Crack | concrete crack | 497/723 |
| concrete wall crack | 573/703 | |
| crack on concrete | 537/683 | |
| crack on concrete brick | 429/905 | |
| cement crack | 485/681 | |
| After Deleting Duplicates | 2073 | |
| Joint/Edge | concrete corner | 456/697 |
| concrete joint | 225/794 | |
| concrete tile | 396/701 | |
| grey concrete tile | 446/705 | |
| After Deleting Duplicates | 1400 | |
| Plant | moss on concrete | 654/757 |
| moss on concrete wall | 773/929 | |
| plant on concrete | 452/890 | |
| After Deleting Duplicates | 1511 | |
| Intact Surface | cement texture | 547/606 |
| concrete surface | 518/853 | |
| concrete texture | 476/489 | |
| concrete wall | 489/644 | |
| smooth concrete wall | 493/619 | |
| After Deleting Duplicates | 2211 |