Thank you.
The gain sliders on the color balance module work brilliantly.
I try Ariel's suggestion of using colorize, but I found it easier to use
color correction. However this way works much better.


On Wed, 14 Sep 2016 at 22:52 Matthieu Moy <matthieu....@grenoble-inp.fr>
wrote:

> I'd try "color balance", using the "gain" sliders which affect essentially
> highlights.
>
> Otherwise, try "color zones" to change the color, with a parametric mask
> to select only the highlights.
>
> In any case, I think you'll need to reduce the exposure: if some color
> channels are clipped, no module can do the job as the result you'd expect
> is not representable in your colorspace.
>
> ----- Original Message -----
> > To make it explicit, if it wasn't already clear - I know what it should
> > look like - I just need to change the two areas (I can draw a mask) to
> that
> > particular colour.
> > I just don't know what module I can use to easily do that.
> > I looked at the modules in the color section, and didn't see one I
> thought
> > I knew how to use.
> >
> > On Wed, 14 Sep 2016 at 17:50 Colin Adams <colinpaulad...@gmail.com>
> wrote:
> >
> > > I don't think it does.
> > > Color reconstruction module uses surrounding colour. That won't work
> here.
> > >
> > > On Wed, 14 Sep 2016 at 17:35 Ariel Kanterewicz <ar...@aknt.com.ar>
> wrote:
> > >
> > >> You may want to look at this post from the blog:
> > >> http://www.darktable.org/2015/03/color-reconstruction/
> > >> It explains a solution for pretty much the same issue you have here.
> > >>
> > >> On Wed, Sep 14, 2016 at 4:54 AM Colin Adams <colinpaulad...@gmail.com
> >
> > >> wrote:
> > >>
> > >>> I took this photo with flash:
> > >>> https://www.dropbox.com/s/f6bmy554la7quho/132441800.jpg?dl=0
> > >>>
> > >>> and it is clearly overexposed in the foreground. Using the graduated
> > >>> density module gives a very nice result, all except for the two large
> > >>> yellow oval patches on the thorax - these should be a (yellowish)
> green.
> > >>> The histogram for these areas shows that both the red and green
> channels
> > >>> are blown out in these areas. But I guess I should be able to alter
> the
> > >>> colour locally in some way (by reducing the red channel, and maybe
> some
> > >>> of
> > >>> the green). What's the best module to use to do this?
> > >>>
> > >>>
> ____________________________________________________________________________
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> > >>>
> > >>
> >
> >
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> --
> Matthieu Moy
> http://www-verimag.imag.fr/~moy/
>

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