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--- |
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library_name: PyLaia |
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license: mit |
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tags: |
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- PyLaia |
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- PyTorch |
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- atr |
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- htr |
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- ocr |
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- historical |
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- handwritten |
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metrics: |
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- CER |
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- WER |
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language: |
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- 'no' |
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pipeline_tag: image-to-text |
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--- |
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# PyLaia - NorHand v1 (post-processed) |
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This model performs Handwritten Text Recognition in Norwegian. It was developed during the [HUGIN-MUNIN project](https://hugin-munin-project.github.io/). |
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## Model description |
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The model has been trained using the PyLaia library on the [NorHand v1](https://zenodo.org/record/6542056) dataset. |
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Line bounding boxes were improved using a post-processing step. |
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Training images were resized with a fixed height of 128 pixels, keeping the original aspect ratio. |
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An external 6-gram character language model can be used to improve recognition. The language model is trained on [this text corpus](https://www.nb.no/sprakbanken/en/resource-catalogue/oai-nb-no-sbr-73/) published by the National Library of Norway. |
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## Evaluation results |
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The model achieves the following results: |
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| set | Language model | CER (%) | WER (%) | |
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|:----- |:-------------- | -------:| -------:| |
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| train | no | 2.33 | 5.62 | |
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| train | yes | 2.62 | 6.13 | |
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| val | no | 8.20 | 24.75 | |
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| val | yes | 7.01 | 19.75 | |
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| test | no | 7.81 | 23.30 | |
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| test | yes | 6.75 | 18.22 | |
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## How to use? |
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Please refer to the [PyLaia documentation](https://atr.pages.teklia.com/pylaia/usage/prediction/) to use this model. |
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# Cite us! |
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```bibtex |
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@inproceedings{pylaia2024, |
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author = {Tarride, Solène and Schneider, Yoann and Generali-Lince, Marie and Boillet, Mélodie and Abadie, Bastien and Kermorvant, Christopher}, |
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title = {{Improving Automatic Text Recognition with Language Models in the PyLaia Open-Source Library}}, |
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booktitle = {Document Analysis and Recognition - ICDAR 2024}, |
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year = {2024}, |
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publisher = {Springer Nature Switzerland}, |
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address = {Cham}, |
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pages = {387--404}, |
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isbn = {978-3-031-70549-6} |
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} |
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``` |
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```bibtex |
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@inproceedings{10.1007/978-3-031-06555-2_27, |
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author = {Maarand, Martin and Beyer, Yngvil and K\r{a}sen, Andre and Fosseide, Knut T. and Kermorvant, Christopher}, |
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title = {A Comprehensive Comparison of Open-Source Libraries for Handwritten Text Recognition in Norwegian}, |
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year = {2022}, |
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isbn = {978-3-031-06554-5}, |
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publisher = {Springer-Verlag}, |
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address = {Berlin, Heidelberg}, |
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url = {https://doi.org/10.1007/978-3-031-06555-2_27}, |
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doi = {10.1007/978-3-031-06555-2_27}, |
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booktitle = {Document Analysis Systems: 15th IAPR International Workshop, DAS 2022, La Rochelle, France, May 22–25, 2022, Proceedings}, |
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pages = {399–413}, |
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numpages = {15}, |
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keywords = {Norwegian language, Open-source, Handwriting recognition}, |
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location = {La Rochelle, France} |
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} |
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``` |
