On 11/16/05, Timo Steuerwald <[EMAIL PROTECTED]> wrote:
> Hi all,
> can anyone explain how the automatical white balance works? - I can not
> find anything about it in the documentation. It can be found at the menu
> in Layers->Colours->Auto->White Balance. I'm not sure if this are
> exactly the right words because I use the german version.
> How does this feature know which pixel should be white? - I expected
> something like the manual white balance in digital cameras: Pointing and
> selecting  an area which should be white, the rest of the picture will
> be changed accordingly.

Open Levels dialog (Layer- Colour-Levels), click on the right color
picker in its bottom that is in charge for white and then pick a color
that seems to be the whitest one. Changes will apply.

You can also "show" this color levels tool the "blackest" and the
"grayest" dots ;-)

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