Captcha Solver

# for http://www.boomlings.com/database/accounts/accountManagement.php captcha's

from PIL import Image

chars = {36 : '0',
         27 : '1',
         32 : '2',
         31 : '3',
         35 : '4',
         37 : '5',
         39 : '6',
         26 : '7',
         40 : '8',
         39 : '9'}

def unrandomise(cpa):
    img = Image.new('RGB',cpa.size)
    for x in range(cpa.size[0]): # all pixels in the captcha are grey.
        for y in range(cpa.size[1]):
            if (cpa.getpixel((x,y))[0] <= 0x20):
                img.putpixel((x,y),(0,0,0))
            elif (cpa.getpixel((x,y))[0] >= 0xe0):
                img.putpixel((x,y),(0xff,0xff,0xff))
            else:
                img.putpixel((x,y),(0xff,0,0))
    return img

def split_num(im,index):
    box = (5+(index*9),im.getbbox()[1],4+((index+1)*9),im.getbbox()[3])
    return im.crop(box)

def read_num(split_im):
    t = 0
    for x in range(split_im.size[0]):
        for y in range(split_im.size[1]):
            if (split_im.getpixel((x,y)) == (255,255,255)):
                t += 1
    if (t == 39):
        if (split_im.getpixel((7,3)) == (255,255,255)):
            return '9'
        return '6'
    else:
        return chars[t]

def read_captcha(im):
    img = unrandomise(im)
    res = ''
    for i in range(5):
        res += read_num(split_num(img,i))
    return res

file_path = 'captcha.jpg'
captcha = Image.open(file_path)
print(read_captcha(captcha))