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59 lines
1.5 KiB
Markdown
59 lines
1.5 KiB
Markdown
# ocrd_calamari
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> Recognize text using [Calamari OCR](https://github.com/Calamari-OCR/calamari).
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[](https://circleci.com/gh/OCR-D/ocrd_calamari)
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[](https://pypi.org/project/ocrd_calamari/)
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[](https://codecov.io/gh/OCR-D/ocrd_calamari)
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## Introduction
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This offers a OCR-D compliant workspace processor for some of the functionality of Calamari OCR.
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This processor only operates on the text line level and so needs a line segmentation (and by extension a binarized
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image) as its input.
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## Installation
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```
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pip install ocrd_calamari
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```
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## Install models
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Download standard models:
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```
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wget https://github.com/Calamari-OCR/calamari_models/archive/master.zip
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unzip master.zip
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```
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Download models trained on GT4HistOCR data:
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```
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wget https://file.spk-berlin.de:8443/calamari-models/GT4HistOCR/model.tar.xz
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mkdir gt4hist-calamari
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cd gt4hist-calamari
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tar xf ../model.tar.xz
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```
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## Example Usage
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~~~
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ocrd-calamari-recognize -p test-parameters.json -m mets.xml -I OCR-D-SEG-LINE -O OCR-D-OCR-CALAMARI
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~~~
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With `test-parameters.json`:
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~~~
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{
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"checkpoint": "/path/to/some/trained/models/*.ckpt.json"
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}
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~~~
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TODO
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----
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* Support Calamari's "extended prediction data" output
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* Currently, the processor only supports a prediction using confidence voting of multiple models. While this is
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superior, it makes sense to support single model prediction, too.
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