Python如何为图片添加水印

from PILimport Image,ImageDraw,ImageFont
 
# 指定要使用的字体和大小；/Library/Fonts/是macOS字体目录；Linux的字体目录是/usr/share/fonts/
font = ImageFont.truetype('/Library/Fonts/Arial.ttf',24)
 
# image: 图片  text：要添加的文本 font：字体
def add_text_to_image(image,text,font=font):
  rgba_image = image.convert('RGBA')
  text_overlay = Image.new('RGBA',rgba_image.size,(255,255,0))
  image_draw = ImageDraw.Draw(text_overlay)
 
  text_size_x,text_size_y = image_draw.textsize(text,font=font)
  # 设置文本文字位置
  print(rgba_image)
  text_xy = (rgba_image.size[0] - text_size_x,rgba_image.size[1] - text_size_y)
  # 设置文本颜色和透明度
  image_draw.text(text_xy,font=font,fill=(76,234,124,180))
 
  image_with_text = Image.alpha_composite(rgba_image,text_overlay)
 
  return image_with_text
 
im_before = Image.open("lena.jpg")
im_before.show()
im_after = add_text_to_image(im_before,'WTF')
im_after.show()
# im.save('im_after.jpg')

fromPILimportImage,ImageDraw
 
defadd_watermark_to_image(image,watermark):
  rgba_image = image.convert('RGBA')
  rgba_watermark = watermark.convert('RGBA')
 
  image_x,image_y = rgba_image.size
  watermark_x,watermark_y = rgba_watermark.size
 
  # 缩放图片
  scale = 10
  watermark_scale = max(image_x / (scale * watermark_x),image_y / (scale * watermark_y))
  new_size = (int(watermark_x * watermark_scale),int(watermark_y * watermark_scale))
  rgba_watermark = rgba_watermark.resize(new_size,resample=Image.ANTIALIAS)
  # 透明度
  rgba_watermark_mask = rgba_watermark.convert("L").point(lambda x: min(x,180))
  rgba_watermark.putalpha(rgba_watermark_mask)
 
  watermark_x,watermark_y = rgba_watermark.size
  # 水印位置
  rgba_image.paste(rgba_watermark,(image_x - watermark_x,image_y - watermark_y),rgba_watermark_mask)
 
  return rgba_image
 
im_before = Image.open("lena.jpg")
im_before.show()
 
im_watermark = Image.open("watermark.jpg")
im_after = add_watermark_to_image(im_before,im_watermark)
im_after.show()
# im.save('im_after.jpg')