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Darktable: An open source photography workflow application

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Re: Darktable: An open source photography workflow application

#21

Post by jay_kyburz »

unicornporn wrote: post #17

Since darktable introduced the scene referred workflow I would argue it's an extremely steep learning curve for anyone coming from display referred software (Lightroom, Capture One etc). Scene referred is very much a cine-thing and I know of no other still image software that uses it. dt v3.6 made scene referred default. Aurélien has been one of the driving forces behind the switch to scene referred and his hour long…

None of what you said makes any sense. For people like me, here is an explanation of scene referred workflow

"The scene-referred workflow places an emphasis on performing image processing in the linear scene-referred part of the pixelpipe. This helps to reduce artifacts and color shifts that can result from processing non-linear pixel values and, by decoupling the image processing from the characteristics of a specific display, it makes it easier to adapt your work in the future to new display media, such as high dynamic range displays."

Re: Darktable: An open source photography workflow application

#22

Post by hatsunearu »

nighthawk454 wrote: post #19
unicornporn wrote: post #17

Since darktable introduced the scene referred workflow I would argue it's an extremely steep learning curve for anyone coming from display referred software (Lightroom, Capture One etc). Scene referred is very much a cine-thing and I know of no other still image software that uses it. dt v3.6 made scene referred default. Aurélien has been one of the driving forces behind the switch to scene referred and his hour long…

In case anyone else is looking for a tl;dr on "scene-referred" this link has a very simple diagram. https://www.filmriot.com/blog/scene-referred-vs-display-refe... gist is whether you do your color grading in the camera's original color space (scene referred) or after transforming to display color space (display referred)

> you do your color grading in the camera's original color space

you do your color grading in linear color space (or something that roughly maps to linear color space) is what that actually means. Linear meaning, the exposure of a pixel is supposed to be proportional to the data number, and the exposure is theoretically infinite (since you can have anywhere between 0 and infinite light). For display color space (for photography this is more in line with "print media color space") there is a maximum brightness and minimum brightness, and you have all the numbers to map brightnesses between the two.

The math is a lot cleaner with linear color spaces.

Re: Darktable: An open source photography workflow application

#23

Post by jws »

unicornporn wrote: post #17

Since darktable introduced the scene referred workflow I would argue it's an extremely steep learning curve for anyone coming from display referred software (Lightroom, Capture One etc). Scene referred is very much a cine-thing and I know of no other still image software that uses it. dt v3.6 made scene referred default. Aurélien has been one of the driving forces behind the switch to scene referred and his hour long…

For anyone caring just enough to wonder what scene referred and display referred are talking about…

scene referred does its filtering and mapping work on the pixel values in a linear space, presumably linear to "photons observed" but I could be wrong there.

display referred does its filtering and mapping on pixel values which have already been through a nonlinear function to make them appropriate for display.

The scene referred people say they don't tend make silly skin tones and avoid "rat piss" sunsets as well as reducing artifacts like halos around blurs. (I presume that means the blurs are something like Gaussian blurs performing linear operations on the nonlinear data.)

This is all I know.

Re: Darktable: An open source photography workflow application

#24

Post by [deleted] »

unicornporn wrote: post #17

Since darktable introduced the scene referred workflow I would argue it's an extremely steep learning curve for anyone coming from display referred software (Lightroom, Capture One etc). Scene referred is very much a cine-thing and I know of no other still image software that uses it. dt v3.6 made scene referred default. Aurélien has been one of the driving forces behind the switch to scene referred and his hour long…

[deleted]

Re: Darktable: An open source photography workflow application

#25

Post by dheera »

porphyra wrote: post #12

Darktable is awesome. However I wish that more modern cameras and lenses would be supported. Darktable depends on the nearly-abandoned lensfun library [1] which doesn't support many cameras and lenses, and has open pull requests that have inexplicably not been merged despite being open for years [2]. Also, the process of contributing calibrations to lensfun is a mess. First, the only way to gain access to create cali…

Yeah, I often do the calibrations in Python (OpenCV for distortions and rawpy and a flat frame for vignetting), spit out a tiff, and then do the rest in darktable. Lensfun is complicated so I never tried to go through that. Libraries are supposed to simplify things and it doesn't.

Re: Darktable: An open source photography workflow application

#26

Post by dang »

Past threads, including one from last month:

Darktable 3.6 - https://news.ycombinator.com/item?id=27720908 - July 2021 (73 comments)

Darktable 3.2.1 - https://news.ycombinator.com/item?id=24156113 - Aug 2020 (47 comments)

Darktable 3.0 - https://news.ycombinator.com/item?id=21874528 - Dec 2019 (120 comments)

Darktable 3.0 Approaching with Many New Features - https://news.ycombinator.com/item?id=21440612 - Nov 2019 (1 comment)

Darktable 2.4.0 released - https://news.ycombinator.com/item?id=16012499 - Dec 2017 (74 comments)

Darktable 2.2.0 released - https://news.ycombinator.com/item?id=13261849 - Dec 2016 (82 comments)

Why don't you provide a Windows build? - https://news.ycombinator.com/item?id=12094038 - July 2016 (3 comments)

Darktable 2.0 released - https://news.ycombinator.com/item?id=10789390 - Dec 2015 (44 comments)

A look at Darktable 2.0 - https://news.ycombinator.com/item?id=10640753 - Nov 2015 (10 comments)

Why there are no darktable builds for Windows - https://news.ycombinator.com/item?id=9883018 - July 2015 (1 comment)

Re: Darktable: An open source photography workflow application

#27

Post by jcun4128 »

dang wrote: post #26

Past threads, including one from last month: Darktable 3.6 - https://news.ycombinator.com/item?id=27720908 - July 2021 (73 comments) Darktable 3.2.1 - https://news.ycombinator.com/item?id=24156113 - Aug 2020 (47 comments) Darktable 3.0 - https://news.ycombinator.com/item?id=21874528 - Dec 2019 (120 comments) Darktable 3.0 Approaching with Many New Features - https://news.ycombinator.com/item?id=21440612 - Nov 2019 (1…

Guess they gave in as I've used it in Windows

Re: Darktable: An open source photography workflow application

#28

Post by spaetzleesser »

unicornporn wrote: post #17

Since darktable introduced the scene referred workflow I would argue it's an extremely steep learning curve for anyone coming from display referred software (Lightroom, Capture One etc). Scene referred is very much a cine-thing and I know of no other still image software that uses it. dt v3.6 made scene referred default. Aurélien has been one of the driving forces behind the switch to scene referred and his hour long…

I have to admit I still don’t get Filmic. I have a basic grasp of it but I am much more comfortable with shadow and highlight adjustments. I have watched pretty much all tutorials I could find but I am struggling big time. I have no idea how other people feel about it but I am starting to wonder if the scene refereed workflow is more an intellectual exercise and less a practical tool.

Re: Darktable: An open source photography workflow application

#29

Post by jka »

adgud wrote: post #4

I've used and I loved it, but then I upgraded my camera and this software does not support new Canon CR3 RAW files yet... Sadly I'll switch to Lightroom until it does...

It looks like the ability to read the CR3 format may be available in freshly-compiled distributions of darktable soon, at least for some cameras. It relies on the exiv2 image library, which added support[1] for CR3 in v0.27.4.

That said, there are some notes in the darktable issue[2] that suggest that the darktable rawspeed library also requires some updates[3].

[1] - https://github.com/Exiv2/exiv2/releases/tag/v0.27.4

[2] - https://github.com/darktable-org/darktable/issues/2170

[3] - https://github.com/darktable-org/rawspeed/pull/271

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