Serverless Tesseract plugin

A Serverless plugin to easily add Tesseract OCR engine to your deployment. Builds tesseract for you in a docker container.

Installation and Configuration

npm install --save serverless-tesseract

Add the plugin to your serverless.yml file and configure:

plugins:
  - serverless-tesseract
custom:
  # This section is optional, as well as all of its keys.
  # Defaults are shown in the example.
  tesseract:
    version: 4.0.0
    leptonica_version: 1.76.0
    tessdata: "osd eng" # Add any other languages rus, deu, ...
    tessdata_url: https://github.com/tesseract-ocr/tessdata/raw/master/
    # Other obvious choices are:
    #   https://github.com/tesseract-ocr/tessdata_fast/raw/master/
    #   https://github.com/tesseract-ocr/tessdata_best/raw/master/
    # The fast ones are used by Ubuntu and Debian by default

Then run sls deploy or sls package as usual.

Usage

This plugins adds tesseract-standalone directory to your build with its executable, libs and tessdata and convenience script tesseract to the root of your project. You may call it directly or add it to path:

LAMBDA_TASK_ROOT = os.environ.get('LAMBDA_TASK_ROOT',
                                  os.path.dirname(__file__))
os.environ["PATH"] = LAMBDA_TASK_ROOT + os.pathsep + os.environ['PATH']

Commands

This plugin defines commands to manufacture and clean artifacts without packaging them:

sls tesseract create
sls tesseract clean

Note that this plugin uses (Docker Artifacts)[https://github.com/Suor/serverless-docker-artifacts] plugin to function, so you can use that to clean up docker containers and images used to build tesseract:

sls dockart clean-docker

You need to add serverless-docker-artifacts to your plugins first though.