User Manual

8 If there’s obviously more chroma than luma noise in the image, you can disable Luma/
Chroma linking at a satisfactory level of luma noise reduction, and then raise the
Chroma Threshold to apply more aggressive Spatial NR to address color speckling in
the picture.
(Top) Before and (Bottom) after noise reduction improves the “look”
9 If you’ve had to use a high Spatial NR Luma or Chroma Threshold setting to reduce
noise visibly, and areas of detail look a bit chunky or aliased, you can choose a
larger setting from the Radius drop-down menu to enable a more detailed analysis of
the scene.
This will result in higher visual quality, but larger NR Radius settings are more processor
intensive, and may reduce real time performance if you don’t have adequate GPU
resources available to your system.
10 If you’ve found suitable noise reduction settings, but the result is too aggressive and
makes the image appear too processed, you can try raising the Spatial NR and/or
Temporal NR Blend parameters to fade between the noise reduction added by each
set of controls, and the image as it was before you added noise reduction.
Try Applying Temporal NR First, then Applying Spatial NR
Because Temporal NR analyzes multiple frames for its noise isolation, it tends to be better at
preserving detail accurately in regions of the image where there’s little motion. If you try
applying Temporal NR first and get a successful result, even if only in part of the image, you
may reduce how much Spatial NR you have to apply, thus improving the overall quality of your
final result.
Keep in mind that while Temporal NR does a great job in unmoving parts of an image but is less
effective when dealing with subjects in motion, Spatial NR is able to reduce noise everywhere
in the frame falling below its threshold, even when there’s motion. Ultimately, a combination of
the two is almost always going to be a winning combination.
Chapter – 134 The Motion Effects and Blur Palettes 2996