OCR backend

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"

Note

Refer to the Settings topic for information on how to create your own Python settings files.

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'