python生成中文验证码，带旋转，带干扰噪音线段

# -*- coding: utf-8 -*-
"""
Created on Sun Oct  4 15:57:46 2015

@author: keithguofan
"""

import random
from PIL import Image,ImageDraw,ImageFont
import math,string
class RandomChar():
    @staticmethod
    def Unicode():
        val = random.randint(0x4E00,0x9FBF)
        return unichr(val)
    @staticmethod
    def GB2312():
        head=random.randint(0xB0,0xCF)
        body=random.randint(0xA,0xF)
        tail=random.randint(0,0xF)
        val = (head <<8)|(body<<4)|tail
        str="%x" % val
     #   return str.decode('hex').decode('gb2312')
       # return str.encode('gb2312').decode('gb2312')
        return codecs.decode(str,'hex_codec').decode('gb2312')

class ImageChar():
    def __init__(self,fontColor=(0,0,0),
                 size=(100,40),
                # fontPath='C:/Windows/Fonts/wqy.ttc',
                 fontPath='C:/Windows/Fonts/simsun.ttc',
                 bgColor=(255,255,255),
                 fontSize=20):
        self.size=size
        self.fontPath=fontPath
        self.bgColor=bgColor
        self.fontSize=fontSize
        self.fontColor=fontColor
        self.font=ImageFont.truetype(self.fontPath,self.fontSize)
        self.image=Image.new('RGB',size,bgColor)

    def rotate(self):
        self.image.rotate(random.randint(0,30),expand=0)
    def drawText(self,pos,txt,fill):
        draw=ImageDraw.Draw(self.image)
      #  print(pos)
       # print(txt)
        #print(self.font)
        #print(fill)
        draw.text(pos,txt,font=self.font,fill=fill)
        del draw

    def randRGB(self):
        return (random.randint(0,255),
                random.randint(0,255),
                random.randint(0,255))

    def randPoint(self):
        (width,height)=self.size
        return (random.randint(0,width),random.randint(0,height))
    def randLine(self,num):
        draw=ImageDraw.Draw(self.image)
        for i in range(0,num):
            draw.line([self.randPoint(),self.randPoint()],self.randRGB())
        del draw
    def randChinese(self,num):
        gap=5
        start=0
        for i in range(0,num):
            char =RandomChar().GB2312()
            x=start + self.fontSize * i +random.randint(0,gap)+gap*i
            self.drawText((x,random.randint(-5,5)),RandomChar().GB2312(),self.randRGB())
            self.rotate()
        self.randLine(18)

    def save(self,path):
        self.image.save(path)

if __name__ == '__main__':
    ic=ImageChar(fontColor=(100,211,90))
    ic.randChinese(4)
    ic.save("5.jpeg")

最近在研究验证码识别，中文的验证码不太好识别，上面的代码我参考了一些博客，亲测通过。我的python环境是python3.4

生成的图片大概是这个样子：

代码很简单。

核心思想是：

生成随机十六进制数字，然后将其转换为汉字，通过ImageDraw的方法将其打印到图片中，对字做一些随机旋转，然后随机加入随机颜色的线段。

如有不懂的可以联系我哦。