| --- |
| pretty_name: GreenOCR-Dataset |
| license: other |
| language: |
| - vi |
| - en |
| task_categories: |
| - image-to-text |
| - image-text-to-text |
| tags: |
| - ocr |
| - document-parsing |
| - layout-analysis |
| - synthetic |
| - vietnamese |
| size_categories: |
| - 100K<n<1M |
| configs: |
| - config_name: preview |
| default: true |
| data_files: |
| - split: article |
| path: preview/article.parquet |
| - split: contract |
| path: preview/contract.parquet |
| - split: exam_paper |
| path: preview/exam_paper.parquet |
| - split: finreport |
| path: preview/finreport.parquet |
| - split: invoice |
| path: preview/invoice.parquet |
| - split: legal |
| path: preview/legal.parquet |
| - split: paper |
| path: preview/paper.parquet |
| - split: slides |
| path: preview/slides.parquet |
| - split: standardbook |
| path: preview/standardbook.parquet |
| - split: textbook |
| path: preview/textbook.parquet |
| - split: webcode |
| path: preview/webcode.parquet |
| - split: wikimedia |
| path: preview/wikimedia.parquet |
| - split: handwriting |
| path: preview/handwriting.parquet |
| - split: form |
| path: preview/form.parquet |
| - split: handnotes |
| path: preview/handnotes.parquet |
| --- |
| |
| # GreenOCR-Dataset |
|
|
| Synthetic document pages for training OCR / document-parsing models, mainly Vietnamese with an English counterpart. Each page comes with |
| exact ground truth (block polygons and content) and a ready-to-train target in the LightOnOCR-3 grounding format. The pages are rendered, |
| not real scans; the `augment` parts are degraded variants (scan / phone / old-paper look). |
|
|
| Every type has three parts: `vi` and `en` (clean pages) and `augment` (degraded pages, Vietnamese and English mixed). `slides` has a fourth |
| part, `bilingual`: slides that mix Vietnamese and English text. |
|
|
| | Type | Pages `vi` / `en` / `augment` | Total | What | |
| |---|---|---:|---| |
| | `article` | 11,153 / 4,152 / 6,054 | 21,359 | Magazine / newspaper pages | |
| | `paper` | 7,979 / 3,890 / 4,241 | 16,110 | Scientific-paper pages | |
| | `legal` | 8,214 / 3,694 / 4,297 | 16,205 | Legal-document pages | |
| | `wikimedia` | 4,616 / 1,646 / 9,636 | 15,898 | Encyclopedia-style pages | |
| | `webcode` | 3,241 / 1,637 / 10,500 | 15,378 | Rendered web pages | |
| | `standardbook` | 4,357 / 3,058 / 13,673 | 21,088 | Book pages | |
| | `contract` | 14,401 / 9,922 / 11,368 | 35,691 | Company contracts | |
| | `finreport` | 9,903 / 8,756 / 10,000 | 28,659 | Financial statements and annual-report pages | |
| | `invoice` | 19,590 / 8,220 / 6,983 | 34,793 | Invoices, receipts, stock slips, utility bills, plus handwritten vouchers and filled forms | |
| | `slides` | 22,458 / 13,672 / 12,673, plus 15,011 `bilingual` | 63,814 | Presentation slides | |
| | `textbook` | 18,077 / 6,818 / 11,740 | 36,635 | School textbook pages | |
| | `exam_paper` | 13,710 / 6,830 / 5,622 | 26,162 | School exam papers, some filled in by hand; an option the student marked is written `A*.` in the target | |
| | `handwriting` | 21,597 / 9,652 / 15,590 | 46,839 | Handwritten documents | |
| | `form` | 10,425 / 7,272 / 12,737 | 30,434 | Forms filled in by hand; check boxes are written `☐` / `☑` | |
| | `handnotes` | 4,497 / 3,561 / 9,815 | 17,873 | Handwritten notes | |
|
|
| 426,938 pages in total. |
|
|
| ## Preview |
|
|
| The Dataset Viewer shows `preview/<type>.parquet`: about 100 example pages per type with their target (JPEG, long side up to 1400 px). |
| The pages are examples, not a random sample; the full set is in the parts below. |
|
|
| ## Layout |
|
|
| ``` |
| <type>/<part>/ |
| images-000.tar, images-001.tar, ... page images (members "images/..."), PNG / JPG |
| gt.tar one .md file per page (the target, for reading) |
| shards.tar per-shard records (same schema as GroundTruth.jsonl) |
| GroundTruth.jsonl full record per page (polygons, blocks, target) |
| lighton.jsonl {"image_path", "target_lighton"} |
| ``` |
|
|
| Extract inside a part directory with `for t in *.tar; do tar xf $t; done`; `image_path` is then valid relative to that directory. |
|
|
| ## Ground truth |
|
|
| `target_lighton` is the page as LightOnOCR-3 grounding text, one block per paragraph in reading order: |
|
|
| ``` |
|  BÁO BÌNH MINH |
| |
|  # Việt Nam là đối tác thương mại quan trọng nhất của Phần Lan ở Đông Nam Á |
| |
|  Các cấp lãnh đạo Phần Lan ... |
| ``` |
|
|
| `` gives the four corners of the block: top-left, top-right, bottom-right, bottom-left of the block as |
| printed, x normalised to the page width and y to the page height, 0..1000. On a tilted or rotated page the box turns with the text. A `+` after the label (`text+`) marks a block continued from a column or |
| page break. Content is Markdown, tables are HTML, formulas LaTeX; a chart is given as its data table, an image as a short description, |
| a diagram as Mermaid. |
|
|
| Labels: text, title, list, table, chart, image, formula, caption, header, footer, page_number, footnote, diagram. |
| |
| Figure rules: |
| |
| - chart: the plotted data as an HTML table, with the unit in the value headers. |
| - table: an HTML table. |
| - diagram: a ```` ```mermaid ```` block that mermaid 11.4.1 parses. |
| - image: a short English description. Visible text is quoted verbatim. No description is empty or a placeholder. |
| - formula: `$$ … $$` LaTeX; inline math and sub/superscripts are `$…$`. A literal dollar sign is written `$`. |
| - Decoration (icons, emoji, stickers) is not in the target. |
| |
| A few images in the wikimedia image tars have no target and are not listed in `lighton.jsonl`. |
| |
| ## Licence |
| |
| Gated, for internal use. The licence terms will be added later. |
| |
| ## Limitations |
| |
| Pages are synthetic; do not use this set alone to measure accuracy on real documents. Strong `augment` settings can make small text partly |
| unreadable while the target still holds it. Some chart values and picture descriptions are estimates and can be wrong. |
| |
