python通过pillow识别动态验证码的示例代码

sudo apt-get update
sudo apt-get install python-dev libtiff5-dev libjpeg8-dev zlib1g-dev libfreetype6-dev liblcms2-dev libwebp-dev tcl8.6-dev tk8.6-dev python-tk
sudo pip2 install pillow

#-*- coding:utf8 -*-
from PIL import Image

im = Image.open("captcha.gif")
#（将图片转换为8位像素模式）
im.convert("P")

# 打印颜色直方图
print im.histogram()

his = im.histogram()
values = {}

for i in range(256):
    values[i] = his[i]

for j,k in sorted(values.items(),key=lambda x:x[1],reverse = True)[:10]:
    print j, k

#-*- coding:utf8 -*-
from PIL import Image

im = Image.open("captcha.gif")
im.convert("P")
im2 = Image.new("P",im.size,255)


for x in range(im.size[1]):
    for y in range(im.size[0]):
        pix = im.getpixel((y,x))
        if pix == 220 or pix == 227: # these are the numbers to get
            im2.putpixel((y,x),0)

im2.show()

#-*- coding:utf8 -*-