Python 给图标添加水印，防止被盗用

import os
from PIL import Image, ImageDraw, ImageFont


def add_text_to_image(image, text):
    font = ImageFont.truetype('C:WindowsFontsAdobeHeitiStd-Regular.otf', 50) # 字体 50大小

    # 添加背景
    new_img = Image.new('RGBA', (image.size[0] * 3, image.size[1] * 3), (0, 0, 0, 0))
    new_img.paste(image, image.size)

    # 添加水印
    font_len = len(text)
    rgba_image = new_img.convert('RGBA')
    text_overlay = Image.new('RGBA', rgba_image.size, (255, 255, 255, 0))
    image_draw = ImageDraw.Draw(text_overlay)

    for i in range(0, rgba_image.size[0], font_len * 40 + 100):
        for j in range(0, rgba_image.size[1], 200):
            image_draw.text((i, j), text, font=font, fill=(0, 0, 0, 50))
    text_overlay = text_overlay.rotate(-45)
    image_with_text = Image.alpha_composite(rgba_image, text_overlay)

    # 裁切图片
    image_with_text = image_with_text.crop((image.size[0], image.size[1], image.size[0] * 2, image.size[1] * 2))
    return image_with_text


if __name__ == '__main__':
    print(os.listdir('./img'))
    for img in os.listdir('./img'):
        print("./img/"+img)
        Img = Image.open("./img/"+img)
        im_after = add_text_to_image(Img, u'沃马外卖 盗用非法 仅供展示')
        im_after.save(u'./out_img/' + str(img)[0:-4] + '.png')
    print('完')

效果图