Easy read capcha with Python
I need crack some easy captcha, so i written one script to do that. I used PIL lib to edit images, convert background to whitem character to black. And Pytesster used to make OCR: Optical Character Recognition.
Thanks for reading
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Security Research
All my Lab:
Linux Lab -- window and Cisco Lab
to be continued - I will update more.
from PIL import Image------------------------------------------------------------
img = Image.open('a.jpeg') # Your image here!
img = img.convert("RGBA")
width, height = img.size
pixdata = img.load()
# Make the letters bolder for easier recognition
for y in xrange(img.size[1]):
for x in xrange(img.size[0]):
if pixdata[x, y][0] < 90:
pixdata[x, y] = (0, 0, 0, 255)
for y in xrange(img.size[1]):
for x in xrange(img.size[0]):
if pixdata[x, y][1] < 136:
pixdata[x, y] = (0, 0, 0, 255)
for y in xrange(img.size[1]):
for x in xrange(img.size[0]):
if pixdata[x, y][2] > 0:
pixdata[x, y] = (255, 255, 255, 255)
img.save("input-black.gif", "GIF")
# Make the image bigger (needed for OCR)
im_orig = Image.open('input-black.gif')
big = im_orig.resize((width, height), Image.NEAREST)
ext = ".tif"
big.save("input-NEAREST" + ext)
# Pytesser
from pytesser import *
image = Image.open('input-NEAREST.tif')
print image_to_string(image)
Thanks for reading
--------------------------------------------------------------------------
Security Research
All my Lab:
Linux Lab -- window and Cisco Lab
to be continued - I will update more.
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