Hi!

For B/W conversions we recommend setting a sensible whitebalance, and using
the "Color Mixer" tool to adjust the response of the RGB components in the
image. The post Anders links to describes only what happens when you
increase saturation.

The BW conversion in the exposure mask is pretty simple:

out_rgb = (in_pixel[R]*3 + in_pixel[G]*6 + in_pixel[B]) / 10;


Regards, Klaus Post

http://www.klauspost.com


On Wed, Oct 13, 2010 at 23:20, Anders Kvist <[email protected]> wrote:

> On 2010-10-13 22:58, Martin Christensen wrote:
> > On 2010-10-13 22:32, Anders Kvist wrote:
> >
> >> Klaus wrote a bit about the saturation change in a blogpost:
> >> http://rawstudio.org/blog/?p=415
> >>
> >>
> > Yeah, so I saw, but can that alone account for why changing the white
> > balance, even delicately, on a desaturated image will quickly send the
> > image spinning into a death spiral? And incidentally what kind of B/W
> > conversion is being done when showing the exposure mask?
> >
>
> I'll let Klaus or Anders B answer this as I don't know anything about it :)
>
> /Anders
>
>
>
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