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Left: without denoising. Right: using imager_denoiser_oidn.

 

The Oidn denoiser (based on Intel's Open Image Denoise technology) is available as a post-processing effect. It is integrated into Arnold for use with IPR as an imager (so that you get a very quickly denoised image as you're moving the camera and making other adjustments). 


  • Arnold will automatically force a box_filter on outputs with filters with known issues when either of the denoisers are used. This is because the Oidn denoiser does not perform well with filters that span across multiple pixels.
  • Denoisers won't work as well after imagers have been applied to them. Therefore denoisers should be applied before any other post-processing imagers (top of imagers list).
  • The Oidn denoiser only works on full frames rather than buckets.

Set Box Filter for better denoising results

Common

Enable

Enables the imager.

Layer Selection 

Enables the imager. 

Main 

Output Suffix  

When set, creates a new additional output with the input name plus the suffix in which the denoised result will be written into. For example, when denoising the "RGBA" AOV with the output_suffix set to "_denoised", the denoised result will be written into a new "RGBA_denoised" output. It only works with multi-layer drivers.


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