Blackmagicdesign cintel, Installation And Operation Manual

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5 If you’re not satisfied with the tradeoff between the maximum possible threshold
of noise reduction and the prevention of motion artifacts, you may want to adjust
the motion threshold setting, lowering it to omit more of the motion from the noise
reduction operation, or raising it to include more motion. If you’re still not satisfied,
you can also try better ‘motion est. type’ and ‘motion range’ settings.
Keep in mind that the strength of temporal NR is to reduce noise in unmoving parts of
the image. When you’ve achieved the best tradeoff between noise reduction in the still
areas and and avoidance of motion artifacts in the moving areas of the image, then it’s
time to turn to spatial NR to further eliminate noise throughout the rest of the picture.
Before (left) and (after) temporal noise reduction. Noise in unmoving parts
of the image is reduced, while detail and some grain is retained.
6 Enable spatial NR by raising either the luma or chroma threshold parameters, which
are linked by default, until you strike a suitable balance between the reduction of noise,
and an unwanted increase in image softness.
7 It’s recommended to choose the ‘better’ option from the spatial NR mode pop-up,
as it will yield the best possible results. However, this can be processor-intensive,
so if you need better real-time performance, you can switch the mode to ‘faster’ and
compare results.
8 If there is 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.
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’ pop-up 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.
85 Working with Clips in DaVinci Resolve