Re: [darktable-user] Highlight Details

[Peter Cripps]

Thanks Bill, thats much better than I've been able to achieve with dt. I 
clearly need to spend time learning how to use the highlight 
reconstruction module!


Before posting the inevitable Lightroom comparison, let me say that I 
really don't like using that software. I have a long list of complaints, 
most of which are well addressed by darktable. I've been using darktable 
on my home linux machine for quite some time, and have been pleased with 
the results.


Then along came the windows version of dt. Great, I thought, I can now 
use the same image processing software on my windows laptop and my linux 
desktop. And so it was. But of course it was now all too easy to compare 
results on my laptop between the two programs. It was then that I 
started to notice that Lightroom does do a better job of highlight 
recovery than darktable.


https://www.dropbox.com/s/1o1q6xpj6pba2s7/Lightroom_final.jpg?dl=0

As I've mentioned before, I'm very conscious of the fact that dt is a 
gift from the developers, who obviously take a lot of pride in their 
work. So this should not be taken as a 'complaint', more a suggestion 
for improvements.


Hope  this isn't all TLDR!

Peter



On 04/10/2018 07:24 PM, William Ferguson wrote:

I took another shot at the image with better results this time

https://www.dropbox.com/s/4fihvmxi0ct9jt6/orf.jpg?dl=0

Sidecar is attached.

Bill





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Re: [darktable-user] Highlight Details

[Peter Cripps]

On 04/09/2018 10:28 AM, Timur Irikovich Davletshin wrote:


Well, did they look the same before reducing exposure? I wonder if
basecurve is the same in both cases (two options are available in DT).
Looks like LR does some sort of highlight reconstruction by default, if
you enable LCh reconstruction in DT you will get same amount of details
but different color cast...




Here's what they looked like before the exposure corrections:

https://www.dropbox.com/s/dj5u2bw2l59z5rs/darktable_before.jpg?dl=0 
(darktable no exposure adjustment)
https://www.dropbox.com/s/y9bcewm1lw2poxj/Lightroom_before.jpg?dl=0 
(Lightroom no exposure adjustment)


Again, dt seems to be missing content at the high intensity end of the 
histogram.


Regarding base curves, etc., here's what dt looks like before all the 
default processes are applied:


https://www.dropbox.com/s/cuznj09n9f1li8y/darktable_start.jpg?dl=0 
(darktable no baseline)




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Re: [darktable-user] Highlight Details

[Peter Cripps]

At risk of complicating this discussion, I processed an over-exposed RAW 
file in darktable and Lightroom. In both cases, I pulled the exposure 
back by 2ev. No other tweaks. The results are quite different, and seem 
to show that dt is losing some of the high intensity pixels.


(I said 'seem to'. Please don't pile into me!)

https://www.dropbox.com/s/se9yawlsbl7zpff/darktable.jpg?dl=0 (darktable)
https://www.dropbox.com/s/0cepsk7i54v4x72/Lightroom.jpg?dl=0 (Lightroom)
https://www.dropbox.com/s/mrg997wamwg6yj6/Y5050211.ORF?dl=0 (.orf)






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Re: [darktable-user] Highlight Details

[Peter Cripps]

And, 'for the sake of science', I downloaded the .dng and opened it in 
Lr and dt.


The histograms are quite different, even allowing for log vs linear on 
the y-axes. Lr shows a bunch of high intensity pixels on the far right 
hand side; these are missing in dt. This is before applying any sliders.


Again, I have seen similar results on several other images.




On 04/08/2018 05:54 PM, Chris wrote:


Hi Guillermo,

For the sake of science here is the .dng file I was using for both the 
DT & LR examples earlier.


https://www.dropbox.com/s/cavd1o7z8r5ao0n/_MG_1496.dng?dl=0

Busy playing with it now paying more attention to the histogram.

Chris




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Re: [darktable-user] Highlight Details

[Peter Cripps]

I've seen similar results to Chris. One of the (few) things that I've 
found Lightroom does better than darktable is highlight recovery.


I have noticed that the darktable histogram doesn't seem to show content 
at the far right hand side that does show in the Lightroom histogram. 
Don't know if this is relevant.


I hesitate to mention this, since I'm very conscious of the fact that 
darktable is entirely created by people working on their own time. It 
seems ungrateful to pick out one thing that isn't perhaps as good as 
with other paid programs.


Peter




On 04/08/2018 02:51 PM, Chris wrote:


Hi,

So the shadows & highlights module also does not seem to full 'reveal' 
the detail in the clouds that I know exists... it simply darkens the 
existing pixels that we can already see. So not really 'recovering 
detail' as such.


https://www.dropbox.com/s/u3lo4oy9dokdbwh/darkt_04.jpg?dl=0

and pushed further

https://www.dropbox.com/s/zih4f434frcxizu/darkt_05.jpg?dl=0

obviously I am going to extremes here... but they still just do not 
compare to the clarity revealed from LR.


https://www.dropbox.com/s/suw9v3jnsszbsec/lr_02.jpg?dl=0

Thanks,

Chris


On 2018/04/08 02:30 PM, Pascal Obry wrote:

Le dimanche 08 avril 2018 à 14:25 -0700, Chris a écrit :

Anyway, these are my adventures into highlights in DarkTable.

You haven't activate the "shadows & highlight" module, so indeed
nothing done for darktable :)
  



 
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Re: [darktable-user] Reinstalled, xmp files not being applied

[Peter Cripps]

Well, that's strange. I did as you suggest: removed an image and then 
reimported it. And, yes, the edits duly appeared. Then I tried another 
image, but before removing it, I noticed that the edits were there. And 
checked some other imported folders, all the edits appear.


I had closed and restarted dt a few times since first noticing the 
problem, so I don't know if that had anything to do with it.


In any case, the problem seems to have gone away. Thanks for your help 
on this -- and all the help you have given others on this list!




then guessing, you still have the original library.db.

open dt and remove the image you want to import
then import it again
see if it shows the edits
dt should read anew the xmp file for an image that is not in it's db





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Re: [darktable-user] Reinstalled, xmp files not being applied

[Peter Cripps]

Patrick, I simply installed from the pmjdebruijin ppa. I don't know what 
that means as far as the db goes?



On 03/19/2018 01:09 PM, Patrick Shanahan wrote:

* Peter Cripps <pe...@petercripps.com> [03-19-18 13:23]:

I've just reinstalled 2.4.1 on Linux Mint 18.3, kernel 4.13.0-37. But when I
open an image, the develop setting stored in the xmp file are not applied. I
have checked the option to "look for changed xmp files on import".

I opened the same image (i.e. the same bits from the same storage) in
Windows. Then the develop setting are applied.

Any idea what is happening? Thanks, Peter.

when you reinstalled dt, did you start with a new db (library)?
   ~/.config/darktable/library.db
   



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[darktable-user] Reinstalled, xmp files not being applied

[Peter Cripps]

I've just reinstalled 2.4.1 on Linux Mint 18.3, kernel 4.13.0-37. But 
when I open an image, the develop setting stored in the xmp file are not 
applied. I have checked the option to "look for changed xmp files on 
import".


I opened the same image (i.e. the same bits from the same storage) in 
Windows. Then the develop setting are applied.


Any idea what is happening? Thanks, Peter.

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Re: [darktable-user] denoising problems

[Peter Cripps]

Bill, thanks for letting us try your noise profiles. I did some quick 
tests, and they seem to work very well, particularly for very noisy images.




On 03/10/2018 07:35 PM, William Ferguson wrote:
I usually shoot 1000-1500 images per game (football, soccer, 
basketball), and 600-800 for baseball and softball.  I shoot raw 
because of the stadium light problem.  I'll shoot a burst and get 3 
too green, 2 just right, 3 too red, 1 just right...


I shoot with a Canon EOS 7D, a camera not renowned for its high iso 
performance.


I've set up 4 styles, low ISO, medium ISO, high ISO, and very high 
ISO.  They are based around three instances of profile denoised, one 
for color noise, one for luminance, and a third to smooth things out.  
The higher the ISO, I start adding things like demosiac, hot pixels, 
lowpass.  I vary the mostly the opacity on the profile denoise, 
increasing it as the ISO increases.


I usually shoot in manual, so all my exposures are pretty much the 
same.  I denoise one image, then copy the history stack and paste it 
to the rest of the images.  If I was changing exposure settings, then 
I denoise one image per group, and copy the history stack to the rest 
of the group.


I've attached my styles, if anyone would like to try them.





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Re: [darktable-user] Transfer of edits from Windows to Linux

[Peter Cripps]

Thanks Patrick.

As it happens, a couple of minutes ago I found the "look for updated xmp 
files on startup" option. Problem fixed!


Then I saw your reply. Classic case of 'crossing in the mail'. Thanks 
again for taking the time to respond.



On 02/25/2018 11:13 AM, Patrick Shanahan wrote:

* Peter Cripps <pe...@petercripps.com> [02-25-18 13:43]:

I have darktable installed on two machines: 2.4.0rc0 on Windows, and 2.4.1
on Linux. If I make edits on the Windows machine, close darktable, and then
open on Linux, the edits don't carry over. Same in the reverse direction,
Linux to Windows.

This used to work at one point. If I open earlier images, the same edits
appear on both systems. I'm wondering if this is caused by having different
versions of darktable on each machine? (It doesn't look as if 2.4.1 is
available in a Windows version right now.)

you have two different databases.  you must import the images into the
*2nd* system in order for the edits to be read into the db.  If you have
already imported them in the 2nd system, then you need to set your system
to check for new xmp (sidecar) files.  see preferences -> core options ->
"look for updated mp files on startup".






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[darktable-user] Transfer of edits from Windows to Linux

[Peter Cripps]

I have darktable installed on two machines: 2.4.0rc0 on Windows, and 
2.4.1 on Linux. If I make edits on the Windows machine, close darktable, 
and then open on Linux, the edits don't carry over. Same in the reverse 
direction, Linux to Windows.


This used to work at one point. If I open earlier images, the same edits 
appear on both systems. I'm wondering if this is caused by having 
different versions of darktable on each machine? (It doesn't look as if 
2.4.1 is available in a Windows version right now.)


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Re: [darktable-user] Re: Problem when I open raw files to edit on DARKTABLE

[Peter Cripps]

I see Jean-Luc has made a couple of interesting posts. All I have to add 
is that I opened your .CR2 file, and I do see the same effects that you 
observe. This is on 2.4.1, Linux Mint 18.3. I also opened the file using 
Lightroom, and again saw an initial image much darker than the .jpeg, 
with some noise.


I was able to match the jpeg pretty well by increasing exposure, 
reducing highlights, and tweaking levels. And profiled denoise did an 
excellent job, as Jean-Luc observed.


In the past, several people have pointed out that the raw files are just 
a starting point, and you wouldn't necessarily expect them to match the 
jpeg. But I will say that I find it convenient if they do look very 
similar, especially if the in-camera jpeg processing is good.






On 02/01/2018 07:58 AM, Diego Queres wrote:

Ok,

I'll attach the original cr2 file. And the jpg file.

I suspect the problem can be color profile (or something like it)...

Maybe Darktable has problems to identify it... and let the picture 
darker.


I test open CR2 file with Picture Viewer and shows the picture ok.
When I open on Shotwell or Darktable, the picture shows darker and 
with noise...


But i don't know the exactly problem...

I use Darktable 2.4.0. Ubuntu 16.04.


​
IMG_0337.CR2 
<https://drive.google.com/file/d/13er4IYY2VQX67VbthVaktsXKUxqGSSRV/view?usp=drive_web>

​​
IMG_0337.JPG 
<https://drive.google.com/file/d/1reDZGZjW_sbC2i8ybk9hHrYIZ-3ONGlJ/view?usp=drive_web>

​


2018-01-31 20:12 GMT-02:00 Peter Cripps <pe...@petercripps.com 
<mailto:pe...@petercripps.com>>:


Can you post the .CR2 file for that picture? I saw the .CR2 that
you posted earlier, but it was a different image; the roses
weren't pure red like these.


On 01/31/2018 01:56 PM, Diego Queres wrote:

See the pictures:




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Re: [darktable-user] Re: Problem when I open raw files to edit on DARKTABLE

[Peter Cripps]

Can you post the .CR2 file for that picture? I saw the .CR2 that you 
posted earlier, but it was a different image; the roses weren't pure red 
like these.



On 01/31/2018 01:56 PM, Diego Queres wrote:

See the pictures:




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Re: [darktable-user] Fixing my color management workflow

[Peter Cripps]

I had a similar problem. Everything looked good on my local devices, but 
images in Google Photos came back looking washed out. The problem went 
away after I set display profile and export file format to sRGB (web safe).



On 12/10/2017 11:28 AM, Andreas Mueller wrote:



On 12/10/2017 02:03 PM, Roman Lebedev wrote:
This is why the output color profile setting should stay at the 
default (sRGB).
So this means if I select sRGB as the output profile, it should show 
correctly in applications that are not color-managed?

That was kind of my goal.
 


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Re: [darktable-user] Surface pen for creating drawn masks

[Peter Cripps]

Answering my own question ...

Of course, it's left click that used to define control points for the 
'path' shape. And the pen doesn't do left click. It does work with the 
brush, circle and ellipse shapes, although I don't see any way to alter 
sizes without a keyboard or mouse wheel.


My  tentative conclusion is that the Microsoft Surface pen is only of 
marginal use with darktable. I'd be happy for someone to point out why 
I'm wrong!


Back to a conventional mouse.



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[darktable-user] Surface pen for creating drawn masks

[Peter Cripps]

I have a Microsoft Surface pen that no longer pairs properly. But it 
does still work as a pointing device, and the right-click button opens 
folders, etc., as I would expect. However, when I try to use the pen to 
define a drawn mask, right-click doesn't define control points. I'm 
wondering if this is something I should expect to work? Perhaps the fact 
that the pen does not pair is a problem?


This is on the Windows build, of course.

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Re: [darktable-user] Re: [darktable-dev] Hard edges with the tone mapping module

[Peter Cripps]

On 11/01/2017 10:11 AM, Patrick Shanahan wrote:


don't know about 2.4.0, there is no base curve blending module that I see
in darktable-2.3.0~git1024.ec24c9282-25.1.x86_64 unless the module has a
different name.



I'm looking at 2.3.0+1021~ga917e5ecc. This came from the installer link 
on pixls.us, downloaded yesterday. I see the 'blend' feature under the 
'scale' and 'fusion' entries on the base curve module. After selecting 
uniform blend, the 'opacity' slider gives the effect I'm referring to.


The action appears to be a progressive blend between the selected base 
curve and linear. But I could be wrong on this.


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Re: [darktable-user] Re: [darktable-dev] Hard edges with the tone mapping module

[Peter Cripps]

Hi Kofa,

Thanks for mentioning the base curve blending feature in your reply to 
François. I was unaware that it existed, but it seems like a very useful 
way to compress overall contrast.


In case anyone else is puzzled, as I was, base curve blending isn't 
included in 2.2.5. At least, I don't see it on my installation. It does 
show up on the Windows build, 2.3.0. Presumably it will be one of the 
new features in the upcoming 2.4.0 release.


Peter




On 11/01/2017 03:43 AM, KOVÁCS István wrote:

Hi,

On 1 Nov 2017 10:35, "François Tissandier" 
> 
wrote:


I'm often using the tone mapping module with non-HDR photos to
reduce the global contrast & improve the local contrast.


While this is not a direct answer to your question, maybe you'll find 
it useful: I don't find much use for that module since the 
introduction of exposure merging in the base curve module. Have you 
tried it?


Kofa

 
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[darktable-user] Darktable and Lensfun

[Peter Cripps]

It seems to me that the latest version of darktable (2.5.5) includes 
installation of lensfun. Here's an extract from the terminal readout 
during installation:



The following NEW packages will be installed:
   darktable liblensfun-data liblensfun0 libopenjp2-7


Later on in the process, I see unpacking and setting up of the lensfun 
files.


And, the lens correction seems to work. It recognizes all my Olympus 4/3 
lenses, and does a fairly decent job of correcting barrel distortion, etc.


I freely admit that I only have a hazy idea of what I'm doing, but the 
end results are good!





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Re: [darktable-user] borderless printing

[Peter Cripps]

Franjo, I should have said 'darkroom section' rather than 'develop 
section'. Too much time in the past using Lightroom!





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Re: [darktable-user] borderless printing

[Peter Cripps]

Hi Franjo,

In addition to Robert's suggestions, you might also check settings in 
the 'framing' module, found under 'more modules' in the develop section.


Peter


On 10/3/2017 6:55 AM, Franjo wrote:

Hi @all,

I'm using LinuxMint 18 and Dt 2.2.5

today I wanted to print with Darktable for the first time. But I can 
not print without borders. In the printer driver I have set 
borderless. Where is the mistake?


Greets Franjo

 


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