Probably you want to use the Color to Alpha plug-in, and select white.
It's at <image>/filters/color/color to alpha.
On Sat, 12 Apr 2003 [EMAIL PROTECTED] wrote:
> I am new to the gimp and have been working with a scanned sketch. I am
> attempting to change the background (now white) to a transparent
> background however I am having difficulty separating the actual sketch
> from the background. I have searched through gimp tutorials, help and
> several books as well as the archives however I have not been successful
> at accomplishing this. If anyone has any suggestions on how I might do
> this or point me in the right direction for further instruction, I would
> be most appreciative. Thanks in advance.
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