[Play Raw] Winter Textures

My brother-in-law has a bamboo stand in his back yard by the coulee (Cajun for ‘creek’); I think it’s worse in regard to propagation than aspen… :boom:

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Thanks for posting,
darktable 3.4.1

DSZ_7522_03.NEF.xmp (18.8 KB)

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Very nice shot, thanks for posting! My try in DT 3.4.1


DSZ_7522.NEF.xmp (12.5 KB)

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DSZ_7522.NEF.pp3 (15.1 KB)

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A B&W rendering, trying to preserve textures:

RT dev (commit 871d35c22)

Overall processing: DSZ_7522.tif.out.pp3 (13.7 KB)
Gold toning, sharpening and resizing: DSZ_7522.jpg.out.pp3 (13.8 KB)

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Little known fact: Bamboo is the world’s largest grass. It is difficult to control and almost impossible to kill.

I learned this because one time a ran over some bamboo my neighbor had planted at our property line. She came out screaming at me that she had planted it and wanted it to grow. I looked at it, shrugged, and having no real idea, told her, “Don’t worry, it will grow back.” It did. :grin:

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Wow Glen! Beautiful winter scene!

And there is also a lot of colors there. However, it was not easy to pick them out:

DSZ_7522_08.NEF.xmp (22,5 KB)

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With Filmulator:

  • Auto CA Correct 1
  • Profiled Distortion on
  • Exposure Compensation +2
  • Drama 64.5
  • White Clipping Point 0.69
  • Highlight Brightness 1000 to crisp up the highlights
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great Job! Only the chromatic abberation is a bit distracting

Interesting… I’m always interested in CA, as I don’t see what I think it is in my lens collection, so I jump at the opportunity to explore it. Here’s a 500% zoom into @s7habo’s image (left) and the raw in-process in rawproc, linear RGB (right):

I assume it’s the yellow edges to which you refer. In the linear RGB, you can see the starting point for that shading, but it’s faint.

On the linear RGB in rawproc, I toggled on and off the lensfun CA correction, that just accents it. I backed out to look at the whole image, and observed that the shadows are splaying in the opposite direction, indicating that the sun is illuminating the branches on the side of the yellow coloring. So I think what’s going on is that the branches have a sunlit component along their edges, and the color correction is amplifying it, to the point of haloing it past its boundaries.

Thanks for pointing that out; I like to pick at such to understand it. What I’ve asserted is just my conjecture; would appreciate others’ takes on it.


DSZ_7522.jpg.out.pp3 (14.2 KB)

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Here’s a 500% zoom of my RT version (just because of CA)

Edit: Left with raw ca correction, right without:

See the version of what @heckflosse just posted!

I must say RawTherapee is unbeatable as far as lens corrections are concerned. For each aspect there is extra function, with the help of which you can make very precise corrections.

I find it outstanding that even if a lens has a lensfun profile, you can still adjust and improve it very precisely because lensfun corrections are mostly half-baked. This is actually the only thing I really miss in darktable.

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Does darktable not have the auto CA correct that occurs before demosaic? Because I’ve separated it out into librtprocess so anyone can have it; Filmulator has it.

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It’s not that easy in darktable because of the roi concept. @hannoschwalm can tell more about that :wink:

Ah, now I remember.

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Hmm, looking at the commit log … honestly most of the work was from me… or do I miss something?

Though of course librtprocess was your idea :+1:

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wow, impressing how clean you got it.

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DSZ_7522.NEF.xmp (9,9 KB)

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Yes, the roi concept makes a few things more difficult. The raw ca module for dt has been updated in current master (will be in 3.6) and includes most features from rt code.

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