Add dataset card

README.md

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+---
+license: unknown
+task_categories:
+- other
+language:
+- vi
+tags:
+- sign-language
+- vietnamese-sign-language
+- pose-estimation
+- dwpose
+- skeleton
+size_categories:
+- 10K<n<100K
+---
+
+# Multi-VSL (front view) — DWPose skeletons
+
+Whole-body 2D pose keypoints extracted with [DWPose](https://github.com/IDEA-Research/DWPose)
+from the front-camera clips of the Multi-VSL Vietnamese Sign Language corpus.
+
+- **28,406** clips, one `.npz` per clip, under `data/`
+- Total size: ~4.6 GB
+
+## Contents of each `.npz`
+
+| key | shape | dtype | description |
+|---|---|---|---|
+| `all_xy` | `(T, 128, 2)` | `float16` | keypoint pixel coordinates per frame |
+| `all_score` | `(T, 128)` | `float16` | per-keypoint confidence |
+| `detected` | `(T,)` | `int8` | 1 if a person was detected in the frame, else 0 |
+| `frame_size` | `(2,)` | `int32` | source video frame size |
+| `fps` | scalar | `float32` | source video frame rate |
+
+`T` is the number of frames in the clip. The 128 keypoints follow the DWPose /
+COCO-WholeBody layout: 17 body + 6 foot + 68 face + 42 hands (21 per hand).
+
+## File naming
+
+```
+<session>___<view>_<device>_<signer>_<view>_<order>_<clip_index>.npz
+```
+
+e.g. `01_Co-Hien_100-200_1-2-3_0118___center_device10_signer01_center_ord1_100.npz`
+
+## Usage
+
+```python
+import numpy as np
+from huggingface_hub import hf_hub_download
+
+path = hf_hub_download(
+    "Tri1/Multi-VSL-front-skeleton",
+    "data/01_Co-Hien_100-200_1-2-3_0118___center_device10_signer01_center_ord1_100.npz",
+    repo_type="dataset",
+)
+d = np.load(path)
+xy, score = d["all_xy"], d["all_score"]   # (T, 128, 2), (T, 128)
+```
+
+Download everything:
+
+```python
+from huggingface_hub import snapshot_download
+snapshot_download("Tri1/Multi-VSL-front-skeleton", repo_type="dataset",
+                  local_dir="skeleton")
+```