| --- |
| language: [bn] |
| license: cc-by-4.0 |
| task_categories: [image-to-text] |
| tags: [ocr, bangla, bengali, handwriting, benchmark, robustness] |
| pretty_name: Bangla OCR Double Benchmark |
| configs: |
| - config_name: default |
| data_files: |
| - split: bongabdo |
| path: data/bongabdo-*.parquet |
| - split: bn_htrd |
| path: data/bn_htrd-*.parquet |
| --- |
| |
| # Bangla OCR Double Benchmark |
|
|
| Two equally weighted, deterministic full-page Bangla handwriting robustness splits: |
|
|
| - `bongabdo`: **6,669** readability-preserving renderings balanced over all 111 Bongabdo pages. |
| - `bn_htrd`: **6,669** renderings balanced over all 75 actual files in the writer-separated |
| BN-HTRd test split. |
|
|
| These are explicitly **compositional/augmentation robustness rows**, not 13,338 independent |
| writers or source documents. Every row exposes its source page ID, source SHA-256, rendered-image |
| SHA-256, and complete deterministic transform receipt. No row changes, obscures, or synthesizes |
| the reference text. |
|
|
| ## Metrics |
|
|
| Each split uses corpus-level Unicode-NFC Bangla WER and CER: |
|
|
| `split score = 50% WER + 50% CER` |
|
|
| `Overall = 50% Bongabdo score + 50% BN-HTRd score` |
|
|
| Lower is better. This release intentionally has no S3 semantic-importance instrument. |
|
|
| ## Provenance |
|
|
| - Bongabdo: 111 pages from 49 contributors, CC BY 4.0. |
| - BN-HTRd: original recognition ground truths joined to the 75 physical test images, CC BY 4.0. |
|
|
| The source archives and final manifests are pinned in `receipt.json` and the manifest files. |
|
|
