验证码自动生成

网上有很多，却都不够简单干脆，自己实现了一个。但可惜字体旋转未能成功。

#!/usr/bin/env python
# coding=utf-8

from PIL import Image, ImageDraw, ImageFont
import os, random
from prepare import clearNoise

class ImageCaptcha(object):

    def __init__(self, size=(200, 60)):
        bgColor = self.random_color(200, 255)
        self.image = Image.new(‘RGB‘, size, bgColor)

    def random_color(self, minc, maxc):
        return (random.randint(minc, maxc),
                random.randint(minc, maxc),
                random.randint(minc, maxc))

    def gen_text(self, cnt=6):
        seq = ‘23456789ABCDEFGHIJKLMNOPQRSTUVWXYZ‘
        text = [random.choice(seq) for i in range(cnt)]
        return ‘‘.join(text)

    def draw_text(self, pos, txt):
        draw = ImageDraw.Draw(self.image)
        fontSize = random.choice([38, 42, 56])
       # font = ImageFont.truetype(‘DroidSerif-Bold.ttf‘, fontSize)
        font = ImageFont.truetype(‘Arimo-Bold.ttf‘, fontSize)
        fontColor = self.random_color(0, 150)
        draw.text(pos, txt, font=font, fill=fontColor)

    def rotate(self, angle):
        self.image = self.image.rotate(random.randint(-1*angle, angle), expand=0)

    def gen_captcha_image(self, text):
        for i, txt in enumerate(text):
            x = 8 + i * 30 + random.randint(-10, 10)
            y = random.randint(0, 10)
            self.draw_text((x, y), txt)
        #    self.rotate(5)

        return self.image

def clear_noise(path):
    fnames = [os.path.join(path, fname) for fname in os.listdir(path) if fname.endswith(‘jpg‘)]
    for fname in fnames:
        img = clearNoise(fname)
        img.save(‘auto/clearNoise/%s‘ % fname.split(‘/‘)[-1])
        print img.size, fname, ‘done‘

if __name__== ‘__main__‘:
    for i in range(20):
        test = ImageCaptcha()
        text = test.gen_text(6)
        img = test.gen_captcha_image(text)
        img.save(‘auto/origin/%s_%d.jpg‘ % (text, i))