Optical Character Recognition OCR
Optical Character Recognition is converting images of text into actual text. In these examples find ways of using OCR in python.
PyTesseract is an in-development python package for OCR.
Using PyTesseract is pretty easy:
try: import Image except ImportError: from PIL import Image import pytesseract #Basic OCR print(pytesseract.image_to_string(Image.open('test.png'))) #In French print(pytesseract.image_to_string(Image.open('test-european.jpg'), lang='fra’))
PyTesseract is open source and can be found here.
Another module of some use is
PyOCR, source code of which is here.
Also simple to use and has more features than
from PIL import Image import sys import pyocr import pyocr.builders tools = pyocr.get_available_tools() # The tools are returned in the recommended order of usage tool = tools langs = tool.get_available_languages() lang = langs # Note that languages are NOT sorted in any way. Please refer # to the system locale settings for the default language # to use.
And some examples of usage:
txt = tool.image_to_string( Image.open('test.png'), lang=lang, builder=pyocr.builders.TextBuilder() ) # txt is a Python string word_boxes = tool.image_to_string( Image.open('test.png'), lang="eng", builder=pyocr.builders.WordBoxBuilder() ) # list of box objects. For each box object: # box.content is the word in the box # box.position is its position on the page (in pixels) # # Beware that some OCR tools (Tesseract for instance) # may return empty boxes line_and_word_boxes = tool.image_to_string( Image.open('test.png'), lang="fra", builder=pyocr.builders.LineBoxBuilder() ) # list of line objects. For each line object: # line.word_boxes is a list of word boxes (the individual words in the line) # line.content is the whole text of the line # line.position is the position of the whole line on the page (in pixels) # # Beware that some OCR tools (Tesseract for instance) # may return empty boxes # Digits - Only Tesseract (not 'libtesseract' yet !) digits = tool.image_to_string( Image.open('test-digits.png'), lang=lang, builder=pyocr.tesseract.DigitBuilder() ) # digits is a python string