:) Another quick update. Use ImageChops.lighter instead of ImageChops.add (same arguments). That way the mask quality should not wear down when adding an alpha channel that is partially the same as the existing one.

Regards,

Florian

Szymon Kosok schrieb:
Hello,

You are my hero, Florian. :) That works! :) Thanks.

Best regards,
Szymon

2008/10/10 Florian Höch <[EMAIL PROTECTED]>:
Ok, I think I got it. The alpha channel needs to be updated during and
inserted after the paste operations.

from PIL import Image, ImageChops

foo = Image.open("bar.png")
alpha = foo.split()[-1]

for p in w:
   baz = Image.open(p.element.binary.path)
   foo.paste(baz, (p.x, p.y), baz)
   alpha = ImageChops.add(alpha, baz.split()[-1])

foo.putalpha(alpha)

Regards,

Florian

Szymon Kosok schrieb:
Hi,

Ok. So here is some baz:

http://i.wonderlife.pl/cache/ubranie-83-620.png
http://i.wonderlife.pl/cache/ubranie-84-620.png

And this is foo:

http://i.wonderlife.pl/img/ciala/mc.png

Regards,
Szymon

2008/10/8 Florian Höch <[EMAIL PROTECTED]>:
Hi,

without seeing the original foo and at least some of the baz images, it's
hard to tell how to achieve what you're looking for. I'd assume you want
some sort of "adaptive multiplication", where only transparent parts are
"multiplied over" the existing image and fully opaque parts "knock out"
everything under it.

Regards,

Florian

Szymon Kosok schrieb:
Hi,

I have another problem with PIL and transparent images. I have such
code:

      foo = Image.open("bar.png")

      for p in w:

          baz = Image.open(p.element.binary.path)

          foo.paste(baz, (p.x, p.y), baz)

And the problem is... every baz (some of them are semi-transparent) is
transparent over every previous element.

Maybe I'll show what I want, and what I got:

http://i36.tinypic.com/2efjlaw.png - this is what I want,
http://i38.tinypic.com/11glf6t.png - and this what I get.

Any hints?

Best regards,
Szymon
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_______________________________________________
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_______________________________________________
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http://mail.python.org/mailman/listinfo/image-sig

_______________________________________________
Image-SIG maillist  -  Image-SIG@python.org
http://mail.python.org/mailman/listinfo/image-sig

_______________________________________________
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http://mail.python.org/mailman/listinfo/image-sig

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