Python3 图片添加水印

PIL 图像库

使用 pip install PIL 时报如下错误:

Collecting PIL
Could not find a version that satisfies the requirement PIL (from versions: )
No matching distribution found for PIL

实际上需要安装的是Pillow

sudo pip install Pillow

示例代码:

# coding:utf-8

from PIL import Image, ImageDraw, ImageFont


def add_text_to_image(image, text):
    font = ImageFont.truetype('C:\Windows\Fonts\STXINGKA.TTF', 36)

    # 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__':
    img = Image.open("test.jpg")
    im_after = add_text_to_image(img, '石家庄')
    im_after.save('水印.png')

Python3 无法将模式 RGBA 写为 JPEG

JPG 不支持透明度, RGBA 表示红色、绿色、蓝色 Alpha 是透明度

你需要丢弃 Alpha 通道或保存为支持透明度的东西比如 PNG

图像类有一个方法转换,可以用来将 RGBA 转换为 RBG 之后你就可以使用 JPG

im = Image.open("audacious.png")
rgb_im = im.convert('RGB')
rgb_im.save('audacious.jpg')

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转载自blog.csdn.net/yilovexing/article/details/104707320