Re: [Gimp-user] removing tint from a picture

[Liam R E Quin <liam holoweb net>]

On Wed, 29 Jul 2015 18:59:40 +0000
John Broyles <johnk_km hotmail com> wrote:

> I recently converted some old slides to digital pictures.  Unfortunately some of the older slides have 
> developed a pink tint, probably from age.  Can I remove this tint in the digital pictures using Gimp?  I 
> looked at color level but could not understand whether this would solve my problem or not.

Two fairly easy ways -

(1) use Colour/Colour Balance
(2) use Colour/Curves to raise green and blue

You can get a start on (2) with Colours->Levels and pressing auto; unfortunately this may lose a small amount 
of detail in highlights and shadows, but if before pressing OK you click on Edit in Curves (the exact labels 
and menu names may vary depending on your language and locale of course) you can move the curves slightly. 
For many applications levels/auto works magic.

Liam

> Thanks,
>
> John
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-- 
Liam Quin - XML Activity Lead, W3C, http://www.w3.org/People/Quin/
Pictures from old books: http://fromoldbooks.org/