This module makes use of pyocr, which uses tesseract.
Installation instruction for tesseract can be found on many pages, e.g.
http://grimhacker.com/2014/11/23/installing-pytesseract-practically-painless/
For homebrew:
brew install tessaract
Follow the instructions on e.g.
- https://github.com/UB-Mannheim/tesseract/wiki
- http://digi.bib.uni-mannheim.de/tesseract/
- http://3.onj.me/tesseract/
wget http://3.onj.me/tesseract/how\ to\ install.txt
wget http://3.onj.me/tesseract/tesseract-core-20160524.exe
wget http://3.onj.me/tesseract/tesseract-langs-20160524.exe
apt install -y tesseract-ocr tesseract-ocr-eng