Add MotionFix dataset card

README.md

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+---
+license: cc-by-4.0
+task_categories:
+- text-to-motion
+- motion-editing
+language:
+- en
+tags:
+- motion
+- human-motion
+- text-driven-motion-editing
+- smpl
+- amass
+pretty_name: MotionFix
+---
+
+# MotionFix
+
+This dataset repository mirrors the released MotionFix data artifacts used for text-driven 3D human motion editing. MotionFix contains 6,730 triplets of source motion, target motion, and edit text.
+
+Upstream resources:
+
+- Project page: https://motionfix.is.tue.mpg.de/
+- Dataset license page: https://motionfix.is.tue.mpg.de/license.html
+- Code repository: https://github.com/athn-nik/motionfix
+- Paper: https://www.arxiv.org/abs/2408.00712
+
+## Files
+
+| file | size | sha256 | note |
+|---|---:|---|---|
+| `motionfix.pth.tar` | 5379761702 | `9d2de0ef80c97f5cf0fbe0579bf58ec22f504782aceacee8d72d9cbc93f8571c` | Full MotionFix release package with 6,730 triplets. |
+| `motionfix_val.pth.tar` | 263046195 | `6ec5b2da91705c32cb495be3b931d2c42136fcbcf5763eadad365052307116e7` | Validation split package, 330 triplets. |
+| `motionfix_test.pth.tar` | 805265131 | `cd2c59a69f0854f5b3cffeebc026fd6df2f63b75e813f6a6151cafa96b76eaea` | Test split package, 1,013 triplets. |
+| `splits.json` | 94284 | `1f91f945b76c85b2780fd9dbdce32bde1f14988a06ceecf16cb2eb4e02d0de45` | Local train/val/test split list. Contains one train id, 006722, that is absent from the full package and annotation JSON. |
+| `amt_motionfix_latest.json` | 6289990 | `8d999be2bffe086cfe2816aefdba944782dc3534e1c45e3fc4dcd5ac8755d203` | MotionFix metadata/annotation JSON, 6,730 entries. |
+
+## Data Format
+
+The `.pth.tar` files are Python pickle files containing dictionaries keyed by MotionFix sample id. Each item contains:
+
+- `text`: edit instruction.
+- `motion_source`: source motion dictionary.
+- `motion_target`: target motion dictionary.
+
+Each motion dictionary contains `rots` `[T, 66]`, `trans` `[T, 3]`, `joint_positions` `[T, 22, 3]`, and `timestamp`. The observed validation and test packages use 120-frame clips.
+
+## Split Note
+
+`motionfix.pth.tar` contains the full 6,730-triplet release. The local `splits.json` contains 6,731 unique ids (`train=5388`, `val=330`, `test=1013`), but train id `006722` is absent from both the full package and `amt_motionfix_latest.json`. Consumers should filter missing ids when using `splits.json`.
+
+## License
+
+The MotionFix dataset license page states that the dataset is released under Creative Commons Attribution 4.0 International (CC-BY-4.0). The upstream code repository has a separate software license.
+
+## Citation
+
+```bibtex
+@inproceedings{athanasiou2024motionfix,
+  title = {{MotionFix}: Text-Driven 3D Human Motion Editing},
+  author = {Athanasiou, Nikos and Ceske, Alpar and Diomataris, Markos and Black, Michael J. and Varol, G{\"u}l},
+  booktitle = {SIGGRAPH Asia 2024 Conference Papers},
+  year = {2024}
+}
+```