Batch Processing PNG Opacity
July 1, 2017 10:08 AM Subscribe
I need an image batch processor that will let me set an "opacity" value for a folder full of PNGs.
I need to adjust what most image editing programs seem to refer to as the "layer transparency" or "layer opacity" for a bunch of single-layer PNG images, and try as I might I can't seem to find a batch-processing app (windows preferably, but mac is OK too, or even linux) that will just let me set that value.
I gather that this has to do with the alpha channel as used by the PNG format but I'm having trouble finding more than that, none of the tools I've tried seem to expose that value, and I'd rather not have to do this manually in Paint.NET for 50+ images....
I feel like ImageMagick should be able to do this, if nothing else, but the discussion of transparency I've found there seems to be more about knockout colors and background transparency.
Is anyone aware of a way to just take a directory full of PNGs and set all of the opacity of all of them to 45%?
I need to adjust what most image editing programs seem to refer to as the "layer transparency" or "layer opacity" for a bunch of single-layer PNG images, and try as I might I can't seem to find a batch-processing app (windows preferably, but mac is OK too, or even linux) that will just let me set that value.
I gather that this has to do with the alpha channel as used by the PNG format but I'm having trouble finding more than that, none of the tools I've tried seem to expose that value, and I'd rather not have to do this manually in Paint.NET for 50+ images....
I feel like ImageMagick should be able to do this, if nothing else, but the discussion of transparency I've found there seems to be more about knockout colors and background transparency.
Is anyone aware of a way to just take a directory full of PNGs and set all of the opacity of all of them to 45%?
Response by poster: that looks promising! Looks like "fade" was the word I didn't try searching. I'll play with it some.
posted by snuffleupagus at 10:12 AM on July 1, 2017
posted by snuffleupagus at 10:12 AM on July 1, 2017
This thread is closed to new comments.
posted by Maecenas at 10:10 AM on July 1, 2017 [2 favorites]