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I have an RGB image with one layer, and I want to apply Round Corners filter to it. However, the filter is disabled (look at the image).
What am I doing wrong???
JoeM
Posted 2011-11-17T09:22:37.033
Reputation: 1 299
"Round corners" filter disabled in GIMP
Answers
2
I solved this. If you meet the problem, check the file extension. It seems that round filter does not work with PNG images even if there is no transparency at all. When I loaded JPG, it worked well.
JoeM
Posted 2011-11-17T09:22:37.033
Reputation: 1 299
41
If alpha channel is added, you can not use Round Corner Filter.
To remove alpha channel, use Layer -> Transparency -> Remove Alpha Channel
zelon
Posted 2011-11-17T09:22:37.033
Reputation: 411
2It seems like after round corners is applied, if you don't have "add background" checked, then you end up with an alpha channel anyhow!? – GreenAsJade – 2015-01-15T22:25:40.577
spot on. UPVOTED! :) – tony gil – 2016-10-16T13:41:50.720
3Why would it matter if there is an alpha channel? – cdmckay – 2014-01-13T19:29:57.967
1
Some filters do not work on pallet based images. Make sure your image has 24-bit colour depth rather than something like 8-bit (be aware that some formats, like PNG, can support 1-, 2-, 4, or 8-bit pallet based images as well as 24-bit RGB ones).
David Spillett
Posted 2011-11-17T09:22:37.033
Reputation: 22 424
2For me, it worked fine with PNGs after I removed the alpha channel. Maybe your PNG was not in RGB or grayscale mode? – barfuin – 2015-01-04T16:17:57.533
as far as i know, JPGs don't have alpha channels, so eventually it goes down to the same solution as zelon's one – WayneEra – 2015-11-23T07:59:05.533