pyocr

pip install pyocr

pip install tesseract-ocr

If tesseract-ocr failed to install then follow this link install-tesseract-ocr-on-ubunt

http://askubuntu.com/a/16269

Tesseract

sudo apt-get install tesseract-ocr

sudo apt-get install tesseract-ocr-eng

Demo test command if tesseract is working:

tesseract scan.png scanned.txt -l eng

https://github.com/tesseract-ocr/tesseract

https://github.com/tesseract-ocr/tesseract/wiki

https://github.com/tesseract-ocr/tesseract/wiki/Compiling

http://miphol.com/muse/2013/05/install-tesseract-ocr-on-ubunt.html

Use Python / PIL or similar to shrink whitespace

http://stackoverflow.com/a/9398422

Using python and PIL how can I grab a block of text in an image?

http://stackoverflow.com/a/9406278