PIL:如何在PNG中使区域透明? [英] PIL: How to make area transparent in PNG?

问题描述

我一直在使用PIL裁剪图像，现在我也想使某些矩形区域透明，例如

from PIL import Image
im = Image.open("sample.png")
transparent_area = (50,80,100,200)
...

解决方案

from PIL import Image
from PIL import ImageDraw
im = Image.open("image.png")
transparent_area = (50,80,100,200)

mask=Image.new('L', im.size, color=255)
draw=ImageDraw.Draw(mask) 
draw.rectangle(transparent_area, fill=0)
im.putalpha(mask)
im.save('/tmp/output.png')

此处，我学会了如何做. /p>

I've been using PIL to crop Images, now I also want to make certain rectangular areas transparent, say

from PIL import Image
im = Image.open("sample.png")
transparent_area = (50,80,100,200)
...

解决方案

from PIL import Image
from PIL import ImageDraw
im = Image.open("image.png")
transparent_area = (50,80,100,200)

mask=Image.new('L', im.size, color=255)
draw=ImageDraw.Draw(mask) 
draw.rectangle(transparent_area, fill=0)
im.putalpha(mask)
im.save('/tmp/output.png')

I learned how to do this here.

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