Not sure if it's a bug or a feature
When I pick "Extract Objects", I get this:
If that doesn't work, there's this:
https://imgur.com/a/Bzv4ANu
which adds some text in the upper left corner, which I don't mind, I just crop it out.
It would be nice to be able to save this "bug" outright without having to crop out the text.
You could "fix" it, I suppose, but, then I'd be minus a "feature".
Choice is yours. I'm ok either way.
Now that I've shown it, I can't repeat it.
Which makes it "fiddly" too.
Could you detail what version of G'MIC you use and on which host software? Using G'MIC-Qt on GIMP, here, it seems this filter works as expected (see video below).
https://github.com/user-attachments/assets/f334f766-3ae5-4995-8369-c4307f944286
Also, doesn't matter if I have an image there or not.
My preview is this:
I'm using G'Mic-QT (Standalone) 3.50 on Linux. It doesn't show up in Gimp 3.0.0-RC2.