RacketVision Dataset

RacketVision is a large-scale, multi-sport dataset and benchmark for advancing computer vision in sports analytics, covering badminton, table tennis, and tennis. It is the first dataset to provide large-scale, fine-grained annotations for racket pose alongside traditional ball positions, enabling research into complex human-object interactions. The benchmark tackles three interconnected tasks: fine-grained ball tracking, articulated racket pose estimation, and predictive ball trajectory forecasting.

Using this Hub repository

This dataset is distributed as static files (videos, CSV, JSON, PKL). Download it with the Hugging Face CLI, then follow the project README for environment setup and training:

# Official code layout (clone https://github.com/OrcustD/RacketVision ): from repo root
hf download linfeng302/RacketVision --repo-type dataset --local-dir source/data

# Stand-alone data folder only (you must point module configs or --data_root to this directory)
hf download linfeng302/RacketVision --repo-type dataset --local-dir data

The in-browser Dataset Viewer may not fully load all assets: COCO detection and pose JSON files use different annotation schemas, so they are not merged into a single datasets-style table. Use the files on disk as documented below.

Directory Layout

data/
├── annotations/
│   └── dataset_info.json          # Global dataset metadata (clip list, splits)
│
├── info/                          # COCO-format annotations for RacketPose
│   ├── train_det_coco.json        # Detection: bbox annotations (train split)
│   ├── val_det_coco.json
│   ├── test_det_coco.json
│   ├── train_pose_coco.json       # Pose: keypoint annotations (train split)
│   ├── val_pose_coco.json
│   └── test_pose_coco.json
│
├── <sport>/                       # badminton / tabletennis / tennis
│   ├── videos/
│   │   └── <match>_<rally>.mp4    # Raw video clips
│   ├── all/
│   │   └── <match>/
│   │       ├── csv/<rally>_ball.csv        # Ball ground truth annotations
│   │       └── racket/<rally>/*.json       # Racket ground truth annotations
│   ├── interp_ball/               # Interpolated ball trajectories (for rebuilding TrajPred data)
│   ├── merged_racket/             # Merged racket predictions (for rebuilding TrajPred data)
│   └── info/
│       ├── metainfo.json          # Sport-specific metadata
│       ├── train.json             # [[match_id, rally_id], ...] for training
│       ├── val.json               # Validation split
│       └── test.json              # Test split
│
└── data_traj/                     # Pre-built trajectory prediction datasets
    ├── ball_racket_<sport>_h20_f5.pkl    # Short-horizon: 20 history → 5 future
    └── ball_racket_<sport>_h80_f20.pkl   # Long-horizon: 80 history → 20 future

Local preprocessing (required for BallTrack): after download, generate per-match frame/<rally>/ (JPG frames) and median.npz from the videos using DataPreprocess/extract_frames.py and DataPreprocess/create_median.py. These are omitted from the Hub release to save space; see the project README.

Data Formats

Ball Annotations (csv/<rally>_ball.csv)

Column	Type	Description
Frame	int	0-indexed frame number
X	int	Ball center X in pixels (1920×1080)
Y	int	Ball center Y in pixels
Visibility	int	1 = visible, 0 = not visible

Racket Annotations (racket/<rally>/<frame_id>.json)

Per-frame JSON with a list of racket instances, each containing:

{
  "category": "badminton_racket",
  "bbox_xywh": [x, y, w, h],
  "keypoints": [[x1, y1, vis], [x2, y2, vis], ...]
}

5 keypoints are defined: top, bottom, handle, left, right.

COCO Annotations (info/*_coco.json)

Standard COCO format used by RacketPose for training/evaluation:

• Detection (*_det_coco.json): 3 categories — badminton_racket, tabletennis_racket, tennis_racket.
• Pose (*_pose_coco.json): 1 category (racket) with 5 keypoints.

Trajectory PKL (data_traj/*.pkl)

Pickle files containing pre-processed sliding-window samples. Each PKL has:

{
    'train_samples': [...],   # List of sample dicts
    'test_samples': [...],
    'train_dataset': ...,     # Legacy Dataset objects
    'test_dataset': ...,
    'metadata': {
        'history_len': 80,
        'future_len': 20,
        'sports': ['badminton'],
        'total_samples': N,
        'train_size': ...,
        'test_size': ...
    }
}

Each sample dict:

{
    'history': np.array(shape=(H, 2)),       # Normalised [X, Y] in [0, 1]
    'future': np.array(shape=(F, 2)),
    'history_rkt': np.array(shape=(H, 10)),  # 5 keypoints × 2 coords, normalised
    'future_rkt': np.array(shape=(F, 10)),
    'sport': str,
    'match': str,
    'sequence': str,
    'start_frame': int
}

Normalisation: Ball coordinates are divided by (1920, 1080). Racket keypoints are divided by the same values.

Split Files (<sport>/info/train.json)

JSON list of [match_id, rally_id] pairs:

[["match1", "000"], ["match1", "001"], ...]

Generating Data from Scratch

If you have the raw videos, use DataPreprocess/ scripts in the code repository to prepare all intermediate files:

cd DataPreprocess

# 1. Extract video frames to JPG
python extract_frames.py --data_root ../data --sport badminton

# 2. Compute median background frame
python create_median.py --data_root ../data --sport badminton

# 3. Generate dataset_info.json and per-sport split files
python generate_dataset_info.py --data_root ../data

# 4. Generate COCO annotations for RacketPose
python generate_coco_annotations.py --data_root ../data

Generating Trajectory Data

After running BallTrack and RacketPose inference, build data_traj/ PKLs:

cd TrajPred

# Interpolate short gaps in ball predictions
python linear_interpolate_ball_traj.py --data_root ../data --sport badminton

# Merge racket predictions with ground truth annotations
python merge_gt_with_predictions.py --data_root ../data --sport badminton

# Build PKL dataset
python build_dataset.py --data_root ../data --sport badminton --history 80 --future 20

Citation

If you find this work useful, please consider citing:

@inproceedings{dong2026racket,
  title={Racket Vision: A Multiple Racket Sports Benchmark for Unified Ball and Racket Analysis},
  author={Dong, Linfeng and Yang, Yuchen and Wu, Hao and Wang, Wei and Hou, Yuenan and Zhong, Zhihang and Sun, Xiao},
  booktitle={Proceedings of the AAAI Conference on Artificial Intelligence (AAAI)},
  year={2026}
}