Python 生成4位验证码图片

import random
import string
from PIL import Image,ImageDraw,ImageFont,ImageFilter
# 字体的位置
font_path = "/Library/Fonts/Arial.ttf"
# 验证码的位数
number = 4
# 生成图片的大小
size = (100,30)
# 图片背景颜色-白色
bgcolor = (255,255,255)
# 验证码字体颜色——蓝色
fontcolor = (0,0,255)
# 干扰线的颜色——红色
linecolor = (255,0,0)
# 是否加入干扰线
draw_line = True
# 图片上干扰线的颜色
line_number = (1,5)
def gene_text():
    # 获取26个英文字母
    source = list(string.ascii_letters)
    for index in range(0, 10):
        # 获取10个数字
        source.append(str(index))
    return ‘‘.join(random.sample(source, number))  # number是生成验证码的位数

#用来绘制干扰线
def gene_line(draw,width,height):
    begin = (random.randint(0, width), random.randint(0, height))
    end = (random.randint(0, width), random.randint(0, height))
    draw.line([begin, end], fill = linecolor)
#生成验证码
def gene_code(k):
    # 宽和高
    width,height = size
    # 创建图片
    image = Image.new(‘RGBA‘,(width,height),bgcolor)
    # 验证码的字体
    font = ImageFont.truetype(font_path,25)
    # 创建画笔
    draw = ImageDraw.Draw(image)
    # 生成字符串
    text = gene_text()
    font_width, font_height = font.getsize(text)
    # 填充字符串
    draw.text(((width - font_width) / number, (height - font_height) / number),text,\
            font= font,fill=fontcolor)
    if draw_line:
        gene_line(draw,width,height)
    # 创建扭曲
    image = image.transform((width+20,height+10), Image.AFFINE, (1,-0.3,0,-0.1,1,0),Image.BILINEAR)
    # 滤镜，边界加强
    image = image.filter(ImageFilter.EDGE_ENHANCE_MORE)
    # 保存验证码图片
    image.save(‘%d.png‘%k)
if __name__ == "__main__":
    # 循环创建验证码图片
    for i in range(0,1000):
        gene_code(i)

原文：http://www.cnblogs.com/lcl15/p/7998701.html