GenerateMe Alpha Channels

Hello,

I was wondering if any of the scripts can include images with alpha channels? Amazing scripts!

Aug 20 '22 04:08 micahalhadeff

Hi! Thanks! Definitely some of the can include processing an alpha channel with some code change. Any specific script?

Aug 23 '22 08:08 genmeblog

I would love to be able to use the png glitch script with images that contain an alpha channel :) but I don't want the whole image to have a 90% opacity for example, I am looking for an option that basically retains the original alpha channel areas if that makes sense.

Aug 23 '22 20:08 micahalhadeff

I haven't verified it yet but you can try to replace this line:

https://github.com/tsulej/GenerateMe/blob/master/pngglitch/pngglitch.pde#L107

with

         color c = ImageLineHelper.getPixelARGB8(line,y);

It should retain (not affected by glitches) alpha channel.

Aug 23 '22 22:08 genmeblog

I replaced it, but it still saves with a black opaque background.

Aug 24 '22 00:08 micahalhadeff

Ah, I see. Remove the line which sets black background, here: https://github.com/tsulej/GenerateMe/blob/29d60da0f3638515752333079277276e7bc2aa6d/pngglitch/pngglitch.pde#L63

(Currently I have no access to pc to verify this).

Aug 24 '22 08:08 genmeblog

Fantastic it works!! Although it does produce some noise around the alpha area in some places, Is there a way to get rid of that?

Aug 24 '22 17:08 micahalhadeff

Good! Regarding noise, all glitches are on the codec side, so I don't know what to do to get rid of them.

Aug 24 '22 17:08 genmeblog

All good, if I decrease the file size it gets rid of the noise. Thank you so much for your help!!

Aug 24 '22 17:08 micahalhadeff

I would love to be able to use the png glitch script with images that contain an alpha channel :) but I don't want the whole image to have a 90% opacity for example, I am looking for an option that basically retains the original alpha channel areas if that makes sense.

On Tue, Aug 23, 2022 at 4:47 AM genmeblog @.***> wrote:

Hi! Thanks! Definitely some of the can include processing an alpha channel with some code change. Any specific script?

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Oct 11 '22 08:10 micahalhadeff