PIL （生成验证码）

Posted 2021-06-04 风hua

#!/usr/bin/env python
# -*- coding:utf-8 -*-
from PIL import Image, ImageDraw, ImageFont, ImageFilter
import random

# 返回一个图片对象，和验证码
def check_code(width=120, height=30, char_length=5, font_file=\'Monaco.ttf\', font_size=28):
    code = []
    img = Image.new(mode=\'RGB\', size=(width, height), color=(255, 255, 255))
    draw = ImageDraw.Draw(img, mode=\'RGB\')

    def rndChar():
        """
        生成随机字母
        :return:
        """
        return chr(random.randint(65, 90))

    def rndColor():
        """
        生成随机颜色
        :return:
        """
        return (random.randint(0, 255), random.randint(10, 255), random.randint(64, 255))

    # 写文字
    font = ImageFont.truetype(font_file, font_size)
    for i in range(char_length):
        char = rndChar()
        code.append(char)
        h = random.randint(0, 4)
        draw.text([i * width / char_length, h], char, font=font, fill=rndColor())

    # 写干扰点
    for i in range(40):
        draw.point([random.randint(0, width), random.randint(0, height)], fill=rndColor())

    # 写干扰圆圈
    for i in range(40):
        draw.point([random.randint(0, width), random.randint(0, height)], fill=rndColor())
        x = random.randint(0, width)
        y = random.randint(0, height)
        draw.arc((x, y, x + 4, y + 4), 0, 90, fill=rndColor())

    # 画干扰线
    for i in range(5):
        x1 = random.randint(0, width)
        y1 = random.randint(0, height)
        x2 = random.randint(0, width)
        y2 = random.randint(0, height)

        draw.line((x1, y1, x2, y2), fill=rndColor())

    img = img.filter(ImageFilter.EDGE_ENHANCE_MORE)
    return img, \'\'.join(code)


if __name__ == \'__main__\':
    image_object, code = check_code()

    # 把图片写入文件
    """
    with open(\'code.png\', \'wb\') as f:
        image_object.save(f, format=\'png\')
    """

    # 把图片的内容写到内存 stream
    """
    from io import BytesIO
    stream = BytesIO()
    image_object.save(stream, \'png\')
    stream.getvalue()
    """