Add dataset card and viewer preview

README.md

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+---
+license: other
+pretty_name: PointSplat Example Data
+task_categories:
+- image-to-3d
+tags:
+- pointsplat
+- gaussian-splatting
+- novel-view-synthesis
+- human-rendering
+configs:
+- config_name: preview
+  data_files:
+  - split: preview
+    path: viewer/preview.parquet
+---
+
+# PointSplat Example Data
+
+This repository hosts compact example data for running PointSplat inference locally.
+
+The zip archives are the recommended download format for reproducing the commands in the PointSplat README. The Dataset Viewer shows a small preview split with one fixed camera per scene:
+
+- DNA-Rendering: 16 validation scenes, camera `23`, frame `000030`.
+- THuman2.0: 10 validation scenes, view `000`, frame `2`.
+
+## Files
+
+| File | Content | Local target path |
+|---|---|---|
+| `DNA_Rendering_example.zip` | 16 DNA-Rendering validation scenes, all views for frame `000030` | `datasets/DNA_Rendering_example` |
+| `THuman2_0_example.zip` | 10 THuman2.0 validation scenes, 16 views per scene | `datasets/THuman2_0_example` |
+| `viewer/preview.parquet` | Small preview table for Dataset Viewer | Used by Hugging Face only |
+
+## Download
+
+```bash
+mkdir -p datasets
+hf download Yujie0012/PointSplat_example_data DNA_Rendering_example.zip \
+  --repo-type dataset \
+  --local-dir datasets
+unzip datasets/DNA_Rendering_example.zip -d datasets
+
+hf download Yujie0012/PointSplat_example_data THuman2_0_example.zip \
+  --repo-type dataset \
+  --local-dir datasets
+unzip datasets/THuman2_0_example.zip -d datasets
+```
+
+## Expected Layout
+
+```text
+datasets/DNA_Rendering_example/
+├── validation_index.json
+├── scenes/<scene_id>/
+│   ├── transforms.json
+│   └── images/<view_id>/000030.webp
+└── masks/<scene_id>/fmasks/<view_id>/000030.png
+```
+
+```text
+datasets/THuman2_0_example/
+└── val/
+    ├── img/<scene_id>_<view_id>/2.jpg
+    ├── mask/<scene_id>_<view_id>/2.png
+    └── parm/<scene_id>_<view_id>/
+        ├── 2_intrinsic.npy
+        └── 2_extrinsic.npy
+```
+
+## Usage
+
+Download `pointsplat_mixed.pt` from [`Yujie0012/PointSplat_pretrained_weights`](https://huggingface.co/Yujie0012/PointSplat_pretrained_weights), then follow the inference commands in the [PointSplat repository](https://github.com/Yujie-G/PointSplat).
+
+## License and Terms
+
+The example data is derived from the upstream DNA-Rendering and THuman2.0 datasets. Please follow the original dataset licenses and terms of use. This repository is intended for lightweight inference verification and preview only.

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