# Attribution and Licensing Record

This file tracks asset-level licensing. It is not legal advice.

## Release decision

The complete model and training-data chain is confirmed MIT-licensed. The project and pilot model metadata use `license: mit`, and derivative weights may be released under the MIT License with the required notices and attribution.

| Asset | Role | Recorded status | Required action |
|---|---|---|---|
| `microsoft/trocr-base-printed` | Ultimate base | MIT via Microsoft UniLM | Retain attribution and MIT notice |
| `Ransaka/TrOCR-Sinhala` | Intermediate checkpoint | MIT, confirmed by Ransaka and declared in repository metadata | Retain attribution and MIT notice |
| `Ransaka/sinhala_synthetic_ocr-large` | Training data | MIT `LICENSE`; DOI 10.57967/hf/1809 | Attribute Ransaka Ravihara and cite DOI |
| `avishadilhara/sinhala-ocr-lk-acts-1010` | Evaluation source | CC BY 4.0 | Attribute authors and cite source |
| Tesseract | Baseline | Apache 2.0 | Record version and cite |
| Surya OCR | Optional baseline | Version-dependent code and model terms | Re-check terms at execution time |

## Citation

If you use these pilot weights, please cite this model, the upstream TrOCR research, and the Sinhala synthetic dataset:

```bibtex
@misc{sinhala_print_trocr_pilot,
  title        = {TrOCR Sinhala Printed Lines — Pilot Weights},
  author       = {Hewapathirana, K. R.},
  year         = {2026},
  publisher    = {Hugging Face},
  url          = {https://huggingface.co/kaan84/sinhala-print-trocr-pilot},
  note         = {Exploratory pilot with synthetic-only evaluation}
}

@article{li2021trocr,
  title         = {TrOCR: Transformer-based Optical Character Recognition with Pre-trained Models},
  author        = {Li, Minghao and Lv, Tengchao and Cui, Lei and Lu, Yijuan and Florencio, Dinei and Zhang, Cha and Li, Zhoujun and Wei, Furu},
  journal       = {arXiv preprint arXiv:2109.10282},
  year          = {2021},
  url           = {https://arxiv.org/abs/2109.10282}
}

@misc{ravihara2024sinhala,
  title         = {sinhala_synthetic_ocr-large},
  author        = {Ravihara, Ransaka},
  year          = {2024},
  publisher     = {Hugging Face},
  doi           = {10.57967/hf/1809},
  url           = {https://huggingface.co/datasets/Ransaka/sinhala_synthetic_ocr-large}
}
```