| --- |
| 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. |
|
|
