I'm foolish. I should have realised this. Thank you.
>On 30.09.2010 05:39, bobdobbs wrote: >> Hi all. >> >> I'd like to delete in such a way that transparency remains. >> >> I've found that this is the default when I'm working on images that I've >> created myself. >> But if I'm working on an image that I've downloaded or gotten from another >> source, I can't predict the behaviour of functions that remove pixels. >> >> In my immediate case, I've got a icon with a white background. I want to >> remove the background. >> However, when I try to remove the white pixels, the result is black pixels. >> >> How can I figure out what the result of deletion operations on pixels will >> be? >> >> How can I consistantly remove colour, leaving transparency? >short answer: always add an alpha channel to the layer, either using the >layers dialog >or via Layers->Transparency->Add Alpha Channel [1]. >The alpha channel determines the transparency for each pixel. The absence of >an alpha channel >means that all pixels are fully opaque and hence they get deleted to >background color [2]. >regards, >peter >[1] http://docs.gimp.org/2.6/en/gimp-layer-alpha-add.html >[2] http://docs.gimp.org/2.6/en/gimp-image-combining.html#gimp-layer-properties -- bobdobbs (via gimpusers.com) _______________________________________________ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
