python库：pyocr、pytesseract
from pyocr import pyocr
import pytesseract
tools = pyocr.get_available_tools()[:]
print(tools[0].image_to_string(Image.open('D:\\123.png'),lang='eng'))
text = pytesseract.image_to_string(Image.open(img,'r'),lang='eng')
tessdata_dir_config = '--tessdata-dir "C:\\Program Files (x86)\\Tesseract-OCR\\tessdata"'
num = pytesseract.image_to_string(im,config=tessdata_dir_config)
英文：eng、中文：chi_sim
tesseract-ocr：http://jaist.dl.sourceforge.net/project/tesseract-ocr-alt/tesseract-ocr-setup-3.02.02.exe
tesseract-ocr训练集地址：https://codeload.github.com/tesseract-ocr/tessdata/zip/master
https://github.com/tesseract-ocr/tessdata
https://github.com/tesseract-ocr/tessdata/find/master
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