Hello Eildert,

I have the same problem. Sometimes I just turn off the base curve if I
don't like the result and work from there. I usually increase exposure,
lightness, contrast and then use the tone curve to put in more contrast.
Usually this results in a significant loss of color. To bring back the
color I use another tone curve instance and increase the slope of the a
and b channels, by moving the edges of the lines towards the middle. I
usually do it pretty drastically and then reduce the overlay: normal to
something like 40% or whatever suits me.

The worst part, however, are blue tones. I have a Canon 60D and blues
just appear purple and overblown when using the base curve. I switched
to the alternative for canon but it's not much better. The red faces on
white people are also rather strong.

Regards,
Glad

On 05.05.2014 21:40, Eildert Groeneveld wrote:
> Dear Marie-Noëlle 
> 
> what you describe as 'lobster' I have named 'hypertonic' people.
> Whatever we call it, it seems clear that we have an issue in DT as far
> as skin colors go. In my case this is a Leica M9 and red seems to be way
> to intense. This means, that I need to fiddle with each image with
> people on them (there is a Leica like Base curve alright).
> 
> My question is: how do you handle this situation when you switched of
> the basecurve. Do you use the Tonecurve instead? And if you do, hwo did
> you create it?
> 
> maybe I can learn from you.
> 
> greetings
> 
> Eildert
> 
> On So, 2013-08-04 at 22:10 +0200, Marie-Noëlle Augendre wrote:
>> I said a few days ago that the basic curve gives lobster skin to
>> people. I'm now working on a whole batch of landscapes photographies,
>> and for them too the colors are very wrong, with greens and yellows
>> completely oversaturated.
>> In both cases, I have to deactivate the basic curve in order to start
>> working on a not too bad picture. When doing so, in both cases, the
>> histogram comes way too much on the left, and I need to adjust the
>> exposition for every picture... to the point I'm wondering whether the
>> basic curve could be supposed to fix a wrong exposition treatment when
>> demosaicing.
>>
>> At shooting time, I take care of the exposition so the histogram is on
>> the right side, sometimes blowing up the higlights. I definitely don't
>> understand why/how I get an underexposed picture when I import it in
>> Darktable and deactivate the basic curve.
>>
>> Marie-Noëlle
>>
>> -- 
>>
>>
>> De l'AIgoual à l'Aubrac, un voyage photographique en Cévennes et
>> Lozère
>> Un livre à offrir ou à s'offrir, en souscription jusqu'au 31 août
>> 2013.
>> Cliquer sur l'image ci-dessus ou ce lien pour en savoir plus
>>
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