Make sure you have pytesseract installed:
pip install pytesseract
You will also need to install tesseract-ocr. On Windows, there is an executable installer, which you can get here: https://github.com/tesseract-ocr/tesseract/wiki/4.0-with-LSTM#400-alpha-for-windows. On a Linux system, you can use apt-get:
sudo apt-get tesseract-ocr
The easiest means of installation on a Mac is using brew:
brew install tesseract
The code for this recipe is in 04/10_perform_ocr.py.
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