Re: [darktable-user] OT: Merging multiple images

[Remco Viëtor]

On mercredi 1 mars 2017 07:57:32 CET Remco Viëtor wrote:
> On mercredi 1 mars 2017 06:57:46 CET darkta...@911networks.com wrote:
> > DT 2.2.3 on arch.
> > 
> > I took photos of a car at night and did some light painting with an
> > LED in 25 seconds blocks.
> > 
> > I have 9 images with each image a different area of the car lit by
> > the LED. How can I merge them and selecting the lit section?
> > 
> > They are all lined up (tripod).
> > 
> > Is there some software that will allow me to masks them.

On reflection, you might not even need masking. One of the layer blend options 
in GIMP (and I 
suppose Krita) uses the lightest of each of the inputs. That might do almost 
exactly what you 
want (perhaps with some modifications of layer opacity or some masking).




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Re: [darktable-user] OT: Merging multiple images

[junkyardsparkle]

Did you try the "create HDR" function in darktable? It sometimes works well for 
this kind of thing, depending on exactly how much light fell where in each shot 
and the overlap... 


On Tue, Feb 28, 2017, at 21:57, darkta...@911networks.com wrote:
> DT 2.2.3 on arch.
> 
> I took photos of a car at night and did some light painting with an
> LED in 25 seconds blocks.
> 
> I have 9 images with each image a different area of the car lit by
> the LED. How can I merge them and selecting the lit section?
> 
> They are all lined up (tripod).
> 
> Is there some software that will allow me to masks them. 
> 
> Gimp is a problem, it's only 8 bit and I'd like to print the image
> to at least 11 by 14 and maybe 16 by 20. (the last time I tried, there
> was some banding in the skys)
> 
> -- 
> sknahT
> 
> vyS
> 
> darktable user mailing list
> to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
> 

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Re: [darktable-user] OT: Merging multiple images

[Remco Viëtor]

On mercredi 1 mars 2017 06:57:46 CET darkta...@911networks.com wrote:
> DT 2.2.3 on arch.
> 
> I took photos of a car at night and did some light painting with an
> LED in 25 seconds blocks.
> 
> I have 9 images with each image a different area of the car lit by
> the LED. How can I merge them and selecting the lit section?
> 
> They are all lined up (tripod).
> 
> Is there some software that will allow me to masks them.
> 
> Gimp is a problem, it's only 8 bit and I'd like to print the image
> to at least 11 by 14 and maybe 16 by 20. (the last time I tried, there
> was some banding in the skys)

You're right, it's off-topic.

That said, you don't have all that many options afaik.

The GIMP springs to mind, since version 2.8 it uses GEGL for most of its 
operations. GEGL is 
supposed to work in floating point. (Note that your final jpeg output will 
still be 8 bit/channel, but 
this shouldn't cause the banding).

Otherwise, there's Krita, mostly used for drawing/painting, but it also has 
layer and masking 
options.

And perhaps Hugin, though the masking options probably aren't optimal for your 
needs.

And of course, if you are a MacOS user, photoshop.

Remco



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[darktable-user] OT: Merging multiple images

[darktable]

DT 2.2.3 on arch.

I took photos of a car at night and did some light painting with an
LED in 25 seconds blocks.

I have 9 images with each image a different area of the car lit by
the LED. How can I merge them and selecting the lit section?

They are all lined up (tripod).

Is there some software that will allow me to masks them. 

Gimp is a problem, it's only 8 bit and I'd like to print the image
to at least 11 by 14 and maybe 16 by 20. (the last time I tried, there
was some banding in the skys)

-- 
sknahT

vyS

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Re: [darktable-user] automatically applies some settings

[darktable]

On Wed, 1 Mar 2017 00:24:59 +0100 (CET)
Jean-Luc CECCOLI  wrote:

>> 2- sharpen (improves slightly)
>> 3- basecurve (that blurs details)  
>Both these are pure nuisance for me. I consider them only polluting
>the stack. I'd like not to see them into the developement stack, but
>the only way to achieve this is to apply them turned off, then
>compress the stack, and finally select the stack entry just under
>them and compress once more or set anything else. I don't use them
>at all. I don't want to have to use them against my will. Instead of
>basecureve, I use a method a member published almost one year ago,
>the thread was "A better starting point". It works very well for me,
>gives far better results than the basecurve in every situation. So,
>yes, if I could have both the basecurve and sharpen eliminated from
>the development stack, I'd be very, very, very happy. 

The thread was "A better starting-point for Nikon RAW-files"
https://www.mail-archive.com/darktable-user@lists.darktable.org/msg00805.html

The problem for this is:

1. This is for Nikon. I have both Canon and Fujifilm x-trans
2. I use Linux

So I can't use Nikon ViewNX2 to generate the various profiles.

On the other hand, I often use the Pentax profile that often gives me
a  better contrast management.

Merci

-- 
sknahT

vyS

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Re: [darktable-user] automatically applies some settings

[Jean-Luc CECCOLI]

Hello,

 

> Message du 27/02/17 00:00
> De : "Michael" 
> A : "darktable forum" 
> Copie à : 
> Objet : Re: [darktable-user] automatically applies some settings
> 
>
> what I mean is when I open a new image up in dt five modules are activated 
> automatically:
> 0- original image
> 1- orientation (which doesn't appear to do anything)
It makes the images always be well oriented. Mandatory for me, as I very often 
take photos in portrait orientation and don't wnat to have to bother with this 
at edit.
 
> 2- sharpen (improves slightly)
> 3- basecurve (that blurs details)
Both these are pure nuisance for me. I consider them only polluting the stack. 
I'd like not to see them into the developement stack, but the only way to 
achieve this is to apply them turned off, then compress the stack, and finally 
select the stack entry just under them and compress once more or set anything 
else.
I don't use them at all. I don't want to have to use them against my will.
Instead of basecureve, I use a method a member published almost one year ago, 
the thread was "A better starting point".
It works very well for me, gives far better results than the basecurve in every 
situation.
So, yes, if I could have both the basecurve and sharpen eliminated from the 
development stack, I'd be very, very, very happy.
 
> 4- color balance (blurs even more)
> 5- white balance (changes the colors of things)
None of those are automatically applied. You must have set them to be so into 
the settings.

>
> I want to eliminate modules 3, 4, and 5 and to understand what module 1 is 
> doing.
 
As I wrote before, it tilts up photos taken in portrait mode.
You _don't_ want this to be off, unless you only use landscape mode.
 
Rgrds,
 
J.-Luc


>
On Sun, Feb 26, 2017 at 5:34 AM, Roman Lebedev  wrote:
>
On Sun, Feb 26, 2017 at 1:08 AM, Michael  wrote:
> > I don't want dt to automatically apply some modules and I want to change
> > other modules settings. How do I do it?
> You are aware that dt uses a fixed pipeline, not like in gimp?
> 
> So if you edit basecurve, edit something else, and then again edit basecurve,
> even though history stack will contain two basecurve entries,
> the image will not have two basecurves applied?
> 
> > --
> > :-)~MIKE~(-:
> Roman.
> 
> > 
> > darktable user mailing list to unsubscribe send a mail to
> > darktable-user+unsubscr...@lists.darktable.org
> 


> 

>
-- 
>




:-)~MIKE~(-:
>






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Re: [darktable-user] Libraw & Fujifilm X-PRO2

[darktable]

On Mon, 27 Feb 2017 18:34:51 -0800
junkyardspar...@yepmail.net wrote:

>Oops, I forgot that darktable won't load lensfun database files with
>a 'version="2"' parameter... sorry.  Attached is a stripped down
>entry for just the X-Pro2 you can use instead. Don't forget to
>restore your system mil-fujifilm.xml file to original. :)

Thank you it worked :)

-- 
sknahT

vyS

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Re: [darktable-user] Darktable with fujifilm, oversaturated blues.

[Remco Viëtor]

On mardi 28 février 2017 11:47:04 CET Roman Lebedev wrote:
> On Tue, Feb 28, 2017 at 12:12 AM, alex  wrote:
> > The Rec2020 RGB seeems to work best! however,
> > 
> > it seems to make normal shades of blue excessivly green..
> 
> Are you *really* sure you
> are changing gamut clipping in the input color profile module
> and *not* the input color profile in input color profile module?
> 
That is one of the options in the "gamut clipping" drop down list...

I didn't have time to check the exact list of options when I first replied, but 
after checking, 
both drop lists show a series of profiles/colour spaces.

As a first try, it seems the most logical to pick an input colour space, and 
clip the gamut to 
that *same* colour space. After that, you can of course experiment. 


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Re: [darktable-user] Darktable with fujifilm, oversaturated blues.

[Roman Lebedev]

On Tue, Feb 28, 2017 at 12:12 AM, alex  wrote:
> The Rec2020 RGB seeems to work best! however,

> it seems to make normal shades of blue excessivly green..
Are you *really* sure you
are changing gamut clipping in the input color profile module
and *not* the input color profile in input color profile module?

> I suppose I have to change depending on the scene
> and subject! But thanks for the info..
Roman.

> On 26/02/17 19:26, David Vincent-Jones wrote:
>
> Try changing the 'input color profile' ... the 'linear XYZ' appears to make
> for a reasonable starting profile, some of the other profiles may also be of
> interest ... the infrared is different!!
>
> David
> (sorry I incorrectly posted this earlier to the wrong message.)
>
> On 02/25/2017 06:45 AM, Remco Viëtor wrote:
>
> On samedi 25 février 2017 11:47:44 CET alex wrote:
>
> I have some serious trouble using darktable with fuji's raw files. It
> seems that certain shades of deep blue are completely oversaturated,
> worst is blue ledlight. Rawtherapee handles the files just fine and in
> camera jpegs are also very good but darktable is doing something strange
> to the files. Link below contains a couple of shots and the rawfile in
> question.
>
> https://www.dropbox.com/sh/7orybjumfljmt58/AACP22Pckk7mSTfITt8xFUB9a?dl=0
>
> That's a known phenomenon, and described in the manual, and it's not limited
> to Fuji raw files (I see it with my Sony raws as well). Iirc, it's caused by
> DT using unconstrained values within its pipeline, and some modules don't
> like
> L values outside the 0..1 range.
>
> A (partial) solution is to set gamut clipping in the "input profile" module
> to
> something else than off. What can also work is lowering the saturation with
> a
> parametric mask limiting the effect to the intense blues.
>
> Remco
> 
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>
>
> 
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