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README.md

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+# crack
+
+Pixel-level pavement crack detection datasets from [CarNet_databases](https://github.com/shiyanrubing/CarNet_databases).
+
+## Datasets
+
+| Folder | Images | Scenario |
+|--------|--------|----------|
+| `BJN260_full_resolution` | 260 | Night scenes (Beijing) |
+| `Rain365_full_resolution` | 365 | Post-rain daytime |
+| `Sun520_full_resolution` | 520 | Sunny daytime |
+
+Each dataset contains:
+
+- `img/` — crack photos
+- `gt/` — pixel-level ground-truth masks
+- `Composite image/` — crack + mask overlays
+
+## Citation
+
+```
+@article{li2021fast,
+    title={Fast and Accurate Road Crack Detection Based on Adaptive Cost-Sensitive Loss Function},
+    author={Kai Li and Bo Wang and Yingjie Tian and Zhiquan Qi},
+    journal={IEEE Transactions on Cybernetics},
+    pages={1-12},
+    year={2021},
+    doi={10.1109/TCYB.2021.3103885}
+}
+```