Re: [Gimp-user] Colour Profiles, RGB and convert to PNG

[Richard Brown <rich gucu org uk>]

Hi All

Thanks for all the help. That cracked it.

Rich

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On 2018-12-06 11:50, Alexandre Prokoudine via gimp-user-list wrote:
> On Thu, Dec 6, 2018 at 2:13 PM Richard Brown wrote:
>
> > Hi All
> >
> > I am trying to convert a jpg to png. I want to remove the background
> > colour. My usual method of doing this to Colour to Alpha but the
> > selection is greyed out.
>
>
> It means there is no alpha channel in the image (it's a JPEG, after 
> all).
>
> Depending on your typical workflow, you can go for one of the two 
> options:
>
> 1. Right-click on the layer in the Layers dock, choose 'Add Alpha 
> Channel'.
>
> 2. Go to Edit > Preferences > Image Import & Export, enable the 'Add an
> alpha channel to imported images' checkbox. Then all newly opened
> JPEG/TIFF/etc. files will have an alpha channel added.
>
> When I open the jpg it asks me whether I want
> > to convert to RGB working space. It has a colour profile embedded in. 
> > Is
> > it possible to remove this or convert the image to png in a different
> > way please? Thanks
>
> Remove what "this"? Different how?
>
> Alex
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