Update README.md

README.md

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-license: apache-2.0
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+---
+license: apache-2.0
+---
+
+## About DTD235
+
+**DTD235** is a texture-focused test set randomly sampled from the [Describable Textures Dataset (DTD)](https://www.robots.ox.ac.uk/~vgg/data/dtd).  
+We release it as a **super-resolution (SR) evaluation** test set to assess how well models capture and preserve fine textures.  
+It is currently used in our codebase: **FGA-SR** — https://github.com/HPC-Lab-KOREATECH/FGA-SR
+
+## Reference — Describable Textures Dataset (DTD)
+
+If you use DTD or our DTD235 subset, please cite the original DTD paper:
+
+- M. Cimpoi, S. Maji, I. Kokkinos, S. Mohamed, A. Vedaldi, **“Describing Textures in the Wild.”** CVPR, 2014.  
+  [Describable Textures Dataset (VGG, University of Oxford)](https://www.robots.ox.ac.uk/~vgg/data/dtd/)
+
+**BibTeX**
+```bibtex
+@InProceedings{cimpoi14describing,
+  Author    = {Cimpoi, Mircea and Maji, Subhransu and Kokkinos, Iasonas and Mohamed, Sammy and Vedaldi, Andrea},
+  Title     = {Describing Textures in the Wild},
+  Booktitle = {Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition (CVPR)},
+  Year      = {2014}
+}
+````
+
+## Acknowledgments
+
+We thank the creators of DTD and the Visual Geometry Group (VGG), University of Oxford, for releasing the dataset for research.
+**DTD235** is a small subset **randomly sampled** from DTD; please refer to the DTD page for terms of use and citation.