添加水印的主要目的是为了版权保护,使自己的图像不被抄袭或者恶意转载。网上有很多制作水印的工具,本帖介绍怎么使用Python-Pillow库给图片添加水印。
使用ImageMagick添加图片水印-Linux 添加文本水印
在图片右下角添加文字:
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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 , 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, text, 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')
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添加图片水印
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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')
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