OCR backendΒΆ

Mayan EDMS ships an OCR backend that uses the FLOSS engine Tesseract (https://github.com/tesseract-ocr/tesseract/), but it can use other engines. To support other engines create a wrapper that subclasses the OCRBackendBase class defined in mayan/apps/ocr/classes. This subclass should expose the execute method. For an example of how the Tesseract backend is implemented take a look at the file mayan/apps/ocr/backends/tesseract.py

Once you create you own backend, in your local.py settings add the option OCR_BACKEND and point it to your new OCR backend class path.

The default value of OCR_BACKEND is "ocr.backends.tesseract.Tesseract"

To add support to OCR more languages when using Tesseract, install the corresponding language file. If using a Debian based OS, this command will display the available language files:

apt-cache search tesseract-ocr

If using the Docker image, pass the environment variable MAYAN_APT_INSTALLS with the corresponding Tesseract language option. Example:

-e MAYAN_APT_INSTALLS='tesseract-ocr-deu'