Python: combine two PNG files as layers

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How to merge a transparant png image with another image using PIL

I have a couple of PNG files:

http://dl.dropbox.com/u/6599273/testing/image1.png
http://dl.dropbox.com/u/6599273/testing/image2.png

As you can see, those images have transparent parts. When you put one on top each other they will form a nice looking image. Here, the composed image:

http://dl.dropbox.com/u/6599273/testing/image_composed.png

I composed the image using paint.net in a really straightforward way (drag&drop). But I need to do it programatically, using Python. And generalized to thousand of images like those (all same dimensions: 256x256 px)

How could I do it? I'm experimenting with PIL. Is it possible?

Many thanks in advance, and best regards

score 3 · Accepted Answer · edited May 23 '17 at 10:28

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This question was already answered at How to merge a transparant png image with another image using PIL. Use the paste method of PIL images

edited May 23 '17 at 10:28

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answered Jan 16 '12 at 14:00

Gandaro

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Mmmm... Pretty close. By doing it in that way, I'm getting this (right part is too dark, I don't know the reason): http://dl.dropbox.com/u/6599273/testing/image_composed_test1.png – Jorge Arévalo Jan 16 '12 at 15:20
Hm, I don't have an idea then… – Gandaro Jan 16 '12 at 15:30
Anyway, thanks for the link. I'm closer now :-) – Jorge Arévalo Jan 16 '12 at 16:35

Python: combine two PNG files as layers

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