Add dataset card, link to paper and code

README.md

@@ -1,3 +1,55 @@
 ---
 license: mit
+task_categories:
+- image-segmentation
+tags:
+- remote-sensing
+- change-detection
+- semantic-change-detection
 ---
+
+# PerASCD Datasets
+
+This repository contains the processed datasets (`SECOND` and `LandsatSCD`) with single-channel `uint8` index labels, as presented in the paper [Foundation Model-Driven Semantic Change Detection in Remote Sensing Imagery](https://huggingface.co/papers/2602.13780).
+
+* **Repository:** [SathShen/PerASCD](https://github.com/SathShen/PerASCD)
+* **Paper:** [Foundation Model-Driven Semantic Change Detection in Remote Sensing Imagery](https://huggingface.co/papers/2602.13780)
+
+## Dataset Description
+
+These datasets are processed for Semantic Change Detection (SCD) in remote sensing imagery. Semantic Change Detection aims to identify changed regions between bi-temporal remote sensing images and predict their semantic categories before and after the change.
+
+### Expected Directory Structure
+
+After downloading, the data should be structured as follows:
+
+```text
+SECOND/
+├── train/
+│   ├── im1/
+│   ├── im2/
+│   ├── label1/
+│   └── label2/
+└── val/
+    ├── im1/
+    ├── im2/
+    ├── label1/
+    └── label2/
+```
+
+Each label is a single-channel `uint8` index map:
+* `0`: unchanged / ignored
+* `1 ~ N`: semantic classes
+
+## Citation
+
+If you use this dataset or the associated code in your research, please cite:
+
+```bibtex
+@article{shen2026foundation,
+  title={Foundation Model-Driven Semantic Change Detection in Remote Sensing Imagery},
+  author={Shen, Hengtong and Yan, Li and Xie, Hong and Wei, Yaxuan and Li, Xinhao and Shen, Wenfei and Lv, Peixian and Tan, Fei},
+  journal={arXiv preprint arXiv:2602.13780},
+  year={2026}
+}
+```