PIL 生成随机验证码

r囧r小猫 2023-02-12 03:28 23阅读 0赞

## 实现效果 ##

![随机验证码][2020122013564328.png]

*  可以随机大小写字母、数字、中文字符
 *  模糊效果，如果觉得不合适，可以调节类 L\_BLUR 的参数
 *  画的线只是辅助去看数字，没有任何意义

from PIL import Image, ImageDraw, ImageFont, ImageFilter
    from random import randint
    
    class L_BLUR(ImageFilter.BuiltinFilter):
        name = "l_blur"
        filterargs = (5, 5), 16, 0, (
            1, 1, 1, 1, 1,
            1, 0, 0, 0, 1,
            1, 0, 0, 0, 1,
            1, 0, 0, 0, 1,
            1, 1, 1, 1, 1,
        )
    
    # random.randint(M, N) 产生一个M到N的随机整数
    def rand_img_color():
        return randint(0,255), randint(0,255), randint(0,255)
    def rand_num_color():
        return randint(0,127), randint(0,127), randint(0,127)
    def rand_zh():
        return chr(randint(0x4E00,0x9FBF))
    def rand_char():
        # 小写字母
        return chr(randint(97,122))
        # 大写字母
        # return chr(randint(65,90))
    def rand_num():
        return str(randint(0,9))
    
    # 1.创建空图片
    image = Image.new('RGB',(120,60),(255,255,255))
    draw = ImageDraw.Draw(image)
    
    # 2.渲染背景
    for x in range(0,120):
        for y in range(0,60):
            draw.point((x, y), rand_img_color())
    w, h = (image.size)
    draw.line((w/4,0) + (w/4,h), fill=rand_img_color(), width=3)
    draw.line((w/2,0) + (w/2,h), fill=rand_img_color(), width=3)
    draw.line((w/4*3,0) + (w/4*3,h), fill=rand_img_color(), width=3)
    draw.line((0,h/2) + (w,h/2), fill=rand_img_color(), width=3)
    image = image.filter(L_BLUR)
    
    # 3.渲染文字
    font = ImageFont.truetype('simhei.ttf', 30)
    draw = ImageDraw.Draw(image)
    for x in range(4):
        y = randint(10,30)
        draw.text((30*x,y), rand_num(), rand_num_color(), font)
    
    image.show()

[2020122013564328.png]: https://img-blog.csdnimg.cn/2020122013564328.png