Film grain in layers - e.g. to selectively hide pattern noise

Implemented

BeO

• 10. Juni 2020 14:02

Pattern noise (read-out noise / PDAF banding) can be very distracting if it occurs, as the appearance is not random (like photon noise) an can be easily detected by human eye (trainded to detect patterns).

Adding film grain can help disguise this noise, but adding it to the whole image equally is most often not beneficial for the image look. It would be great if it could be applies using a mask in those areas where the pattern appears.

This could also help to selectively "add" perceived sharpness, or for other creative purposes.

2

• 

  Ian Wilson

  Moderator

  • 12. Juni 2020 08:03

  

  Does use of the Moire tool as a local adjustment help?

  Ian

  0
• 

  BeO

  • 12. Juni 2020 14:29

  

  Thanks Ian,

  not that much.

  The remaining patterns are rather made of luminance noise, in area with rather low frequency detail which were underexposed, and grain can help to hide the pattern. It doesn't get rid of the noise, obviously, but it reduces the perceived patterns.

  regards

  0
• 

  Ian Wilson

  Moderator

  • 12. Juni 2020 15:22

  

  OK, I see. You can apply luminance noise reduction locally.

  Ian

  0
• 

  BeO

  • 12. Juni 2020 15:51

  

  Which can increase the perception of the patterns, or fully flattens this part of the image.

  It really is a balancing act with NR, clarity and grain which works best.

  If C1 would enhance NR to better cope with pattern noise, this of course would be very welcome too.

  Nevertheless, I wished since years I would have grain as a local adjustment, for one of the other occasion and reason, I try to get away without it because I know it is not currently supported.

  Creating two variants (one with grain, one without) and then editing / merging, masking them in Affinity or similar is of course a workaround, but too much effort.

   

  0
• 

  Lily

  • 15. Juni 2020 07:36

  HI BeO,

  Thank you for your post.

  I will forward your request on the ability to use the Film Grain tool in Layers to the Product Management team.

  2
• 

  Rupert Laycock

  • 30. Juni 2020 13:27

  I second this. Being able to use Film Grain as a layer and using Luma Range would give the ability to make a more natural/realistic film grain, insofar as it can be applied differently to different tonal areas.

   

  Thanks

  1
• 

  FirstName LastName

  • 24. August 2022 14:36

  I totally agree because in capture one grain is applied in a zone where real film photos don't, as a completely white zone

  A better film simulation or the capability to adjust the tool by the user will be really appreciated, to avoid exporting the image in other software just for correct the grain 

   

  Thanks

  0
• 

  BeO

  • 21. Februar 2023 13:53

  

  Yes indeed, there are many use cases for a localized film grain tool.

  0

Post ist für Kommentare geschlossen.