---
license: cc-by-nc-4.0
task_categories:
  - object-detection
language:
  - km
tags:
  - document-layout
  - khmer
  - coco
  - object-detection
pretty_name: ARDB Daily Bulletin Layout (COCO)
size_categories:
  - n<1K
configs:
  - config_name: default
    data_files:
      - split: train
        path: data/train-*
      - split: validation
        path: data/validation-*
      - split: test
        path: data/test-*
---

# ARDB Daily Bulletin Layout Detection (COCO)

A document-layout **object-detection** dataset built from **ARDB (Agricultural and Rural
Development Bank of Cambodia) daily market-price bulletins** — born-digital Khmer-language PDFs,
one price table per page. Every page is annotated with bounding boxes for five layout regions
(table, text, section header, page furniture, picture).

Each row is a full page image rendered at **200 DPI (2000 × 2000 px, JPG)** with its box
annotations embedded, so the Dataset Viewer shows the image beside its labels.

## Dataset structure

| Split      | Pages | Boxes | Source documents |
|------------|------:|------:|-----------------:|
| train      |    73 |   341 | 24 bulletins     |
| validation |     9 |    42 |  3 bulletins     |
| test       |     9 |    42 |  3 bulletins     |
| **total**  | **91**| **425**| **30 bulletins** |

### Fields

| Column      | Type            | Description |
|-------------|-----------------|-------------|
| `image`     | image           | Embedded page image (JPG, 2000 × 2000). |
| `image_id`  | int64           | Row index within the split. |
| `file_name` | string          | Source image file name. |
| `doc_id`    | string          | Identifier of the originating bulletin. |
| `source`    | string          | Originating PDF (provenance). |
| `width`     | int64           | Image width in pixels. |
| `height`    | int64           | Image height in pixels. |
| `objects`   | struct of lists | Per-box annotations (see below). |

`objects` is a struct of parallel lists carrying the full COCO annotation fields:

- `id` — annotation id
- `bbox` — `[x, y, width, height]` in pixels (COCO convention)
- `category_id` — class index (0–4, see below)
- `category` — human-readable class name
- `area` — box area in px²
- `iscrowd` — always `0`
- `score` — annotation confidence (`1.0`, human-verified)

### Classes

| id | name             | Boxes | Notes                                   |
|----|------------------|------:|-----------------------------------------|
| 0  | `Table`          |    91 | The price table — exactly one per page, covering the full table including header row and label columns. |
| 1  | `Text`           |    30 | Body / paragraph text.                  |
| 2  | `Section-Header` |    31 | Headings and titles.                    |
| 3  | `Page-Furniture` |   182 | Page headers and footers.               |
| 4  | `Picture`        |    91 | Logos and stamps.                       |

## Usage

```python
from datasets import load_dataset

ds = load_dataset("Soxavin/ardb-layout-coco-v2")   # splits: train / validation / test
row = ds["train"][0]
row["image"]          # PIL image
row["objects"]["bbox"]        # list of [x, y, w, h]
row["objects"]["category"]    # list of class names
```

## Data collection & annotation

1. **Source.** Publicly published ARDB daily market-price bulletins, rendered page-by-page at
   200 DPI.
2. **Pre-annotation.** Candidate boxes were generated automatically with a document-layout
   detector and confidence-filtered, then mapped to the five-class set above.
3. **Human correction.** Every page was reviewed and corrected in Roboflow: fragmented table
   regions merged to one box per page, box edges tightened, mislabels fixed, and spurious boxes
   removed. All final annotations carry `score = 1.0`.
4. **Splitting.** Splits are assigned **by document** (no bulletin's pages appear in more than
   one split) to prevent near-duplicate-page leakage. Assignment is deterministic.

## Limitations

- **Single template.** All bulletins share one recurring page layout, so the validation and test
  splits measure annotation quality rather than generalization across document designs.
- **Small scale.** 91 pages / 30 documents; suitable for fine-tuning and evaluation on this
  document family, not as a general-purpose layout corpus.

## License

The **annotations** in this dataset (bounding boxes, class labels, and metadata) are released
under **CC BY-NC 4.0** — free to use for non-commercial research with attribution. The **page
images** are reproductions of bulletins published by ARDB; they are included for research use
only, and users are responsible for complying with the source documents' terms. This dataset is
not affiliated with or endorsed by ARDB.