Re: [darktable-dev] Multiple white balances?

[Thomas Werzmirzowsky]

On 07.02.2017 20:49, J. Liles wrote:
>
> On Tue, Feb 7, 2017 at 10:20 AM, Thomas Werzmirzowsky
> > wrote:
>
> Hello everybody,
>
> I was just wondering if there are any plans to add the feature of
> multiple white balances to darktable.
>
> Usually I'm watching lightroom tutorials online as there are not many
> for darktable and it seems to be a common thing
> to have multiple white balances. This seems to be used especially
> often
> for sunset/sunrise to have warmer tones around
> the sun/in the sky.
>
> I tried to reproduce that in darktable using "color correction" and
> "split toning" modules but didn't really succeed. Also having
> just another white balance module with a mask seems to be much easier.
>
> Thanks a lot for your feedback.
>
> Best regards
> Thomas
>
>
> Just butting in here... The color correction filter with mask can do
> this and, as already mentioned, the graduated density filter has color
> tint for a similar purpose (although you can also use a graduated mask
> in the color correction filter.)
>
> This isn't the only situation where Darktable's model of masking (each
> module may have a mask) being different from Lightroom's (one mask aka
> brush can control many parameters simultaenously) creates confusion.
>
> Lightroom's method is probably more efficient too, since a pipeline is
> being run on the image and then masked/blended in all at once, rather
> than separately applying and masking/blending in each module/operator.
>
> I'm used to the way Darktable does it, but from a usability standpoint
> I think the 'brushes' model makes more sense. When you want to color
> correct a face *and* adjust the exposure of a face *and* do something
> else to everything that's *not* a face (such as stronger NR.) it gets
> pretty clunky and slow. Especially if you want to refine that mask
> (later.)
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I'm going to try graduated density module but at least for the color
correction I always had the problem that it just didn't look as good as
it would have been using the white balance. But I guess I'm just missing
the experience to do it.

Anyway I didn't want to say that the approach of Lightroom is better
than the one of darktable. Both have their advantages and disadvantages.
Nonetheless I don't have any clue about how darktable works internally
but wouldn't the following be possible?

Just have multiple pipeline calls per image each having their own
modules, module masks etc. At the end of each pipeline a new module
"global mask" is added that just applies the usual mask feature to the
whole image creating (semi-)transparent areas (ideally the first
pipeline wouldn't have that). Afterwards the result of all pipelines are
just overlayed into one result image. Using that way both (and even a
combination of both) would be possible: Having a mask per module or
multiple modules per mask without having to calculate the mask multiple
times.

A easy "half step" solution for that might also be to have multiple
local copies (each with its own XMP file) that can be grouped into a
single image in the lighttable view. That approach would only need to
create the "global mask" module and the image merge. Of course you could
not see the result in real time but it would be a step into that
direction :-)


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Re: [darktable-dev] Multiple white balances?

[Jean-Luc Coulon (f5ibh)]

I also asked in the past for a local white balance.
There is a good example with capture one here:
http://blog.phaseone.com/white-balance-compromises/

It is, of course, possible to get an appropriate result with some smart ans
strick use of the existing tools.
I've been at a workshop where capture one was available. I asked to see how
it really works.
The local white balance is really a nice tool.

Regards

Jean-Luc

2017-02-07 20:49 GMT+01:00 J. Liles :

>
> On Tue, Feb 7, 2017 at 10:20 AM, Thomas Werzmirzowsky 
> wrote:
>
>> Hello everybody,
>>
>> I was just wondering if there are any plans to add the feature of
>> multiple white balances to darktable.
>>
>> Usually I'm watching lightroom tutorials online as there are not many
>> for darktable and it seems to be a common thing
>> to have multiple white balances. This seems to be used especially often
>> for sunset/sunrise to have warmer tones around
>> the sun/in the sky.
>>
>> I tried to reproduce that in darktable using "color correction" and
>> "split toning" modules but didn't really succeed. Also having
>> just another white balance module with a mask seems to be much easier.
>>
>> Thanks a lot for your feedback.
>>
>> Best regards
>> Thomas
>>
>>
> Just butting in here... The color correction filter with mask can do this
> and, as already mentioned, the graduated density filter has color tint for
> a similar purpose (although you can also use a graduated mask in the color
> correction filter.)
>
> This isn't the only situation where Darktable's model of masking (each
> module may have a mask) being different from Lightroom's (one mask aka
> brush can control many parameters simultaenously) creates confusion.
>
> Lightroom's method is probably more efficient too, since a pipeline is
> being run on the image and then masked/blended in all at once, rather than
> separately applying and masking/blending in each module/operator.
>
> I'm used to the way Darktable does it, but from a usability standpoint I
> think the 'brushes' model makes more sense. When you want to color correct
> a face *and* adjust the exposure of a face *and* do something else to
> everything that's *not* a face (such as stronger NR.) it gets pretty clunky
> and slow. Especially if you want to refine that mask (later.)
>
>
>
>
>
>
>
>
>
>
>
>
> ___
> darktable developer mailing list to unsubscribe send a mail to
> darktable-dev+unsubscr...@lists.darktable.org
>

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Re: [darktable-dev] Multiple white balances?

[J. Liles]

On Tue, Feb 7, 2017 at 10:20 AM, Thomas Werzmirzowsky 
wrote:

> Hello everybody,
>
> I was just wondering if there are any plans to add the feature of
> multiple white balances to darktable.
>
> Usually I'm watching lightroom tutorials online as there are not many
> for darktable and it seems to be a common thing
> to have multiple white balances. This seems to be used especially often
> for sunset/sunrise to have warmer tones around
> the sun/in the sky.
>
> I tried to reproduce that in darktable using "color correction" and
> "split toning" modules but didn't really succeed. Also having
> just another white balance module with a mask seems to be much easier.
>
> Thanks a lot for your feedback.
>
> Best regards
> Thomas
>
>
Just butting in here... The color correction filter with mask can do this
and, as already mentioned, the graduated density filter has color tint for
a similar purpose (although you can also use a graduated mask in the color
correction filter.)

This isn't the only situation where Darktable's model of masking (each
module may have a mask) being different from Lightroom's (one mask aka
brush can control many parameters simultaenously) creates confusion.

Lightroom's method is probably more efficient too, since a pipeline is
being run on the image and then masked/blended in all at once, rather than
separately applying and masking/blending in each module/operator.

I'm used to the way Darktable does it, but from a usability standpoint I
think the 'brushes' model makes more sense. When you want to color correct
a face *and* adjust the exposure of a face *and* do something else to
everything that's *not* a face (such as stronger NR.) it gets pretty clunky
and slow. Especially if you want to refine that mask (later.)

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Re: [darktable-dev] Multiple white balances?

[Roman Lebedev]

On Tue, Feb 7, 2017 at 9:20 PM, Thomas Werzmirzowsky  wrote:
> Hello everybody,
>
> I was just wondering if there are any plans to add the feature of
> multiple white balances to darktable.
It was recently disscussed. Last consensus was that it may not work in our
pipeline too well, but can be done.
But first, sidepanel code needs to be brushed a little.

I started the changes, but did not finish them.

> Usually I'm watching lightroom tutorials online as there are not many
> for darktable and it seems to be a common thing
> to have multiple white balances. This seems to be used especially often
> for sunset/sunrise to have warmer tones around
> the sun/in the sky.
>
> I tried to reproduce that in darktable using "color correction" and
> "split toning" modules but didn't really succeed. Also having
> just another white balance module with a mask seems to be much easier.
>
> Thanks a lot for your feedback.
>
> Best regards
> Thomas
Roman.
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