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SebastianSainio
SebastianSainio
Participant
March 17, 2024
Question

AI Denoise causes green artifacts in processed images

  • March 17, 2024
  • 1 reply
  • 2237 views

Hi! I’ve been using Lightroom for a couple months now and I recently noticed that on some images with bare tarmac the AI noise reduction causes wierd green artifacts or shifts some pixels green on textured surfaces in pictures.
I added a couple screenshots of photos viewed at 100% magnification to show the difference between the RAW-file preview and the processed DNG-file. The green artifacts are visible in the jpeg copies from the DNG:s too.
Any idea what might be causing this? I’ve tried using a ”blank” photo with no processing added and I get the same green speckles in the Denoise processed DNG-file. Top photo: Processed DNG. Bottom photo: Preview of the RAW-file.

 

Here is the system info I copied from Lightroom Classic:

 

Lightroom Classic version: 13.2 [ 202402141005-bf1aeb84 ]
License: Creative Cloud
Language setting: en
Operating system: Mac OS 12
Version: 12.7.4 [21H1123]
Application architecture: arm64
Logical processor count: 8
Processor speed: NA
SqLite Version: 3.36.0
Built-in memory: 16 384,0 MB
Dedicated GPU memory used by Lightroom: 2 753,8MB / 10 922,6MB (25%)
Real memory available to Lightroom: 16 384,0 MB
Real memory used by Lightroom: 1 363,7 MB (8,3%)
Virtual memory used by Lightroom: 406 953,3 MB
Memory cache size: 109,0MB
Internal Camera Raw version: 16.2 [ 1763 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2
Camera Raw virtual memory: 325MB / 8191MB (3%)
Camera Raw real memory: 421MB / 16384MB (2%)

Cache1:
Preview1- RAM:78,0MB, VRAM:561,0MB, DSC_0103.NEF
NT- RAM:78,0MB, VRAM:561,0MB, Combined:639,0MB

Cache2:
final1- RAM:211,0MB, VRAM:0,0MB, DSC_0103.NEF
T- RAM:211,0MB, VRAM:0,0MB, Combined:211,0MB

Cache3:
m:109,0MB, n:77,1MB

U-main: 83,0MB

Standard Preview Size: 2560 pixels
Displays: 1) 2560x1600

Graphics Processor Info:
Metal: Apple M1
Init State: GPU for Export supported by default
User Preference: Auto

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Users/sebastian/Pictures/Lightroom/Lightroom Catalog.lrcat
Settings Folder: /Users/sebastian/Library/Application Support/Adobe/Lightroom

Installed Plugins:
1) AdobeStock
2) Aperture/iPhoto Importer Plug-in
3) DxO PhotoLab 6
4) DxO PhotoLab 6 Importer
5) Flickr
6) HDR Efex Pro 2
7) Nikon Tether Plugin

Config.lua flags: None

 

With best regards, Sebastian

    This topic has been closed for replies.

    1 reply

    johnrellis
    johnrellis
    Legend
    March 20, 2024

    Upload one of the problem raws to Dropbox, Google Drive, or similar and post the sharing link here. As a first step, we can see if the problem occurs on other LR installations or is specific to yours.

    SebastianSainio
    SebastianSainioAuthor
    Participant
    March 20, 2024

    Here is the raw file of the shot depicted above: https://we.tl/t-UxKYmjU2MO 

    johnrellis
    johnrellis
    Legend
    March 21, 2024

    I see the same results on my LR 13.2 / Mac OS 14.2.1 / M2. 

     

    The green artifacts on the asphalt are significantly exaggerated by Texture +100 -- setting Texture 0 doesn't get rid of them but it makes them much less noticeable.

     

    Also, enabling Lens Corrections > Remove Chromatic Aberration reduces the artifacts slightly.

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