Lightroom/Camera Raw: Noise reduction only on shadows

  • 7
  • Idea
  • Updated 2 years ago
  • (Edited)
Would be great if we had noise reduction adjustable only on shadows in camera raw & LR ?
Photo of Ninu dsfgdfg

Ninu dsfgdfg

  • 3 Posts
  • 0 Reply Likes

Posted 5 years ago

  • 7
Photo of Ninu dsfgdfg

Ninu dsfgdfg

  • 3 Posts
  • 0 Reply Likes
1. Rob Cole, Feb 21, 2014 4:46 AM in reply to Marian Ilie Report
Yes. But it would be better if we had an easy way to select only shadows, so we could then apply any changes to them (noise reduction, color, tone, ... ).

Ditto for highlights, and all the dark blue stuff, and all the ... stuff.

Nik software supports this via U-points, and I hope Adobe invents a similiar auto-masking technology that blows U-points out of the water .

Cheers,
Rob
Photo of Kevin Hawkins

Kevin Hawkins

  • 1 Post
  • 0 Reply Likes
The ability to reduce noise only in the shadow areas would be fantastic.  I envision three sliders:
1.  First slider allows one to choose how much of the shadows to affect.  One way would be to allow the user to turn the affected areas red, like when the adjustment brush is used.
2.  Second slider allows one to feather the noise reduction -- heavier in the most affected areas, lighter in the others.
3.  Third slider adjusts how much noise to remove.
Photo of Steve Sprengel

Steve Sprengel, Champion

  • 2643 Posts
  • 337 Reply Likes
Besides applying more noise-reduction to dark areas, noise also increases in those darker areas if you stretch their contrast, either by increasing Shadows, reducing Blacks or applying Clarity.

Anytime we increase the dynamic range of an area we also increase the noise.

It seems like Adobe could compute a NR-strength "mask" as a combination of what was dark before adjustments occurred and what areas are the most different from what brightness they started out as after adjustments have occurred.
Photo of Ronny Walter

Ronny Walter

  • 3 Posts
  • 0 Reply Likes
Great suggestion Steve, exactly this behaviour is what I have in my mind right now. It would be great to have the NR stronger in relation to how much you have pushed the EV of that area. I know I could simulate that a little bit with the noise-slider in the brushes, but this suggested behaviour would save much time :)
Photo of Ronny Walter

Ronny Walter

  • 3 Posts
  • 0 Reply Likes
Addition: this is getting even more interesting when editing RAW files of ISO-less sensors, since you can push the darks very much. So you could have more or less ISO 100 highlights and ISO 3200 darks (that are ISO 3200 midtones later ;) ).
Photo of David Converse

David Converse

  • 20 Posts
  • 20 Reply Likes
If you open the file into Photoshop, you can mask it and then use the Camera RAW filter directly on the image.

The only thing I export directly from Lightroom is proof images. Everything else gets retouched in Photoshop, YMMV depending on your workflow.
Photo of Ronny Walter

Ronny Walter

  • 3 Posts
  • 0 Reply Likes
But what exactly can you mask? Shadows - ok.
The NR should be based on the amount of pushing the exposure of the RAW file which makes more noise visible. This could be an algorithm LR could more or less easily implement - it "knows" the exposure-levels out-of-cam and knows where the picture was brightened up (and where parts of the image therefore exhibit more noise than other parts - which isn't limited to shadows in the final image).
Furthermore the quality of noise reduction directly on the RAW can yield better results than having it processed with multiple programs.
My workflow is based on LR solely. Have to keep the number of involved programs small because of the amount of pictures ;-)