---
dataset_info:
  features:
  - name: image_path
    dtype: string
  - name: file_name
    dtype: string
  - name: image_id
    dtype: int64
  - name: annotation_id
    dtype: int64
  - name: category_id
    dtype: int64
  - name: category_name
    dtype: string
  - name: keypoints
    list: float64
  - name: bbox
    list: float64
  - name: iscrowd
    dtype: int64
  - name: area
    dtype: float64
  splits:
  - name: train
    num_bytes: 84650208
    num_examples: 157298
  - name: validation
    num_bytes: 10581683
    num_examples: 19663
  - name: test
    num_bytes: 10580603
    num_examples: 19661
  download_size: 71179531
  dataset_size: 105812494
configs:
- config_name: default
  data_files:
  - split: train
    path: data/train-*
  - split: validation
    path: data/validation-*
  - split: test
    path: data/test-*
---

# Brazilian Jiu-Jitsu (BJJ) Positions Dataset

## Overview
This dataset contains annotated images for **Brazilian Jiu-Jitsu (BJJ) positions** such as guard, mount, side control, turtle, takedown, and standing.  
Each annotation provides **category labels**, **bounding boxes**, and **keypoints** in COCO-style format.  

The dataset has been pre-split into:
- **train** (80%)
- **validation** (10%)
- **test** (10%)

Splits were performed **per-category by percentage** (so each class is represented proportionally in all splits).

---

## Data Format
Each sample contains the following fields:

- `image_path`: Local path to the image (may not be valid on Hub, provided for reference).  
- `file_name`: File name of the image.  
- `image_id`: Unique image identifier.  
- `annotation_id`: Unique annotation identifier.  
- `category_id`: Integer ID for the BJJ position.  
- `category_name`: Human-readable label (e.g. `"mount1"`, `"closed_guard2"`, `"standing"`).  
- `keypoints`: 17 keypoints `[x, y, v]` (COCO style; `v=0` not labeled, `1` labeled but not visible, `2` visible).  
- `bbox`: `[x, y, w, h]` bounding box.  
- `iscrowd`: Standard COCO flag.  
- `area`: Area of the bounding box.  
- `image_url` *(optional)*: If provided, a URL for downloading the image.

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## Statistics
Approximate distribution (train/val/test combined):

- Total samples: ~196k  
- Number of classes: 18 (BJJ positions)  
- Example classes:  
  - `standing`  
  - `mount1`, `mount2`  
  - `closed_guard1`, `closed_guard2`  
  - `turtle1`, `turtle2`  
  - `5050_guard`  
  - `side_control1`, `side_control2`  
  - `open_guard1`, `open_guard2`  
  - `takedown1`, `takedown2`  
  - `half_guard1`, `half_guard2`  
  - `back1`, `back2`

---