RaphaelBfr/morphology4metrology-bnf2813

Dataset for BnF, fr. 2813 — Grandes Chroniques de France

Line-level dataset used in the experiments for the paper Leveraging Morphology for Historical Script Metrological Analysis (ICDAR 2026).

Annotator: Malamatenia Vlachou Efstathiou

Description

This dataset contains polygonal line extractions (with alpha transparency) and line-level transcriptions from the codex Paris, BnF, fr. 2813 (Grandes Chroniques de France).

The identifier btv1b84472995 refers to the ark ID of this manuscript in Gallica.

This Hugging Face repository mirrors the dataset.zip folder from the official Zenodo release (v2).

For the full Zenodo package (including HTR ground truth with page images and ALTO XML), see the Zenodo record.

Folder structure

btv1b84472995/
├── annotation.json
├── images/
│   ├── <page_folder>/
│   │   ├── <line_id>.png
│   │   └── ...
│   └── ...
├── charset.json              # generated by the training code if absent
├── charset_accent.json
└── charset_without_accent.json

annotation.json

JSON object keyed by line image filename:

{
  "<image_id>": {
    "split": "train",
    "label": "A beautiful calico cat.",
    "line": "DefaultLine",
    "zone": "MainZone#1",
    "script": "RaouletOrleans",
    "folio": "1r",
    "gp": "GP1",
    "doc": "HT1"
  }
}

Field	Description
label	Transcription of the line (graphemic, CATMuS-compliant)
split	e.g. train
script	Identifier for the scribal hand
zone	Column zone (MainZone#1 or MainZone#2)
line	Line type (e.g. DefaultLine, RubricLines, HalfLines)
folio	Folio identifier
gp	Graphic profile
doc	Document / hand identifier

Usage with learnable-DTLR

1. Download this dataset:

pip install huggingface_hub
hf download RaphaelBfr/morphology4metrology-bnf2813 --repo-type dataset --local-dir /path/to/datasets/btv1b84472995

2. Set datasets_path in datasets/config.json:

{
  "datasets_path": "/path/to/datasets"
}

3. Use --data_folder btv1b84472995 in the training scripts.

Pretrained weights: RaphaelBfr/morphology4metrology

Training scripts: scripts/btv1b84472995/

What's in Zenodo v2 (not all included here)

The Zenodo record also provides:

• btv1b84472995_GT.zip — HTR ground truth with full-page Gallica images and ALTO XML annotations (eScriptorium)
• btv1b84472995_metadata.csv — metadata for newly annotated folios (v2 adds 95 folios)
• Two versions of annotation.json on Zenodo (with / without hyphenation for word breaks at end of lines)

Image credit

High-resolution source images: Source gallica.bnf.fr / Bibliothèque nationale de France

License

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Citation

If you use this dataset, please cite the Zenodo record:

@dataset{vlachou2026bnf2813,
  author    = {Vlachou Efstathiou, Malamatenia},
  title     = {Dataset for BnF, fr. 2813 - Grandes Chroniques de France},
  year      = {2026},
  publisher = {Zenodo},
  doi       = {10.5281/zenodo.18745702},
  url       = {https://doi.org/10.5281/zenodo.18745702}
}

And the paper:

@inproceedings{vlachou2026metrology,
  title     = {Leveraging Morphology for Historical Script Metrological Analysis},
  author    = {Vlachou-Efstathiou, Malamatenia and Baena, Raphael and
               Stutzmann, Dominique and Aubry, Mathieu},
  booktitle = {Document Analysis and Recognition -- ICDAR 2026},
  publisher = {Springer},
  year      = {2026}
}

Links

Zenodo (canonical)	doi.org/10.5281/zenodo.18745702
Paper	arxiv.org/abs/2606.09446
Project page	malamatenia.github.io/morphology4metrology-analysis
Code	github.com/malamatenia/learnable-DTLR