Topaz Video AI Alpha v4.2.3.1.a (Nyx v3)

Hello everyone,

Today we have a new Alpha build to test an updated version of the Nyx denoise model.

Topaz Video AI 4.2.3.1.a

Nyx v3

  • Nyx 3 improves the consistency of denoising across a wider variety of videos.
  • The accuracy of the auto-parameter estimation has been improved, and the sharpen control has been restored.
  • The model no longer sharpens by default, significantly reducing the unnatural grainy texture ( orange peel artifacts). The figure below illustrates this issue in Nyx 2 and the result from Nyx 3.

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Incredibly, V3 is much better than V2:)

is there a way to denoise without blurring the image?

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Another question:
What is the intention of the use of Nyx v3 vs. Nyx fast.
“By design”, when one should use Nyx v3 and when one should use Nyx fast?
In other words: What are the intention use cases (By design) one should use Nyx v3 and use cases for the use of Nyx Fast?

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@tony.topazlabs awesome, I’m glad this was looked into.
This looks much better than v2, I did have to turn down sharpening to -72 and turn up noise and large noise reduction to around 91 to get the better noise reduction in the sky than v1.
But it seems V3 does a much better job at increasing or preserving details in the image than v1 on conservative settings. I’m still just getting into it.

Initially I have one question: what’s the best way to reduce some of the contrast? You can see in this image with v3 under the truck there is a lot of darker more contrast lines.

Here with nyx v1 we can a little more natural of an image, a the parts under the truck bars are grey rather than black.

how is it compared to Nyx Fast?

Text ? photo exemple Text no restored :frowning:

As a person who hates noise, who would almost take rubbery over sand storm, I am less concerned with the loss of detail, but the issues with focus, and losing it. Sure, if I apply it strong I expect rubbery, but I do not expect an in focus item to go out-of-focus.

*** The figure below illustrates this issue in Nyx 2 and the result from Nyx 3.** ←

I was wondering myself, but left is not the input but the output of Nyx 2.

To me Nyx V3 looks great, testing it right now.

yeah the picture is not really a good example. but I noticed that denoising blurs image and reduce details. I was wondering if there is any way of removing noise without the blurring the image

Currently I couldn’t spot any advantage Nyx v3 has over Nyx Fast.
I ran few compares using the same settings on few videos and the results are almost identical (even with Video-Compare tool I struggled to spot the difference), favoring Nyx fast for being much faster to process.

That is why I asked the Question:
What is the intention of the use of Nyx v3 vs. Nyx fast. by design?
“By design”, when one should use Nyx v3 and when one should use Nyx fast?
In other words: What are the intention use cases (By design) one should use Nyx v3 and use cases for the use of Nyx Fast?

Probably only a problem on cartoons. It’s making some ghosts of the last frame.
image
image
image

Other than that, my initial impressions are positive.

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BUG: This was introduced awhile ago. When creating an image sequence preview, an extra folder is created and is empty. For example, if I have a movie named clip.mkv, and I have already made a few previews, and I create another one, it will make two more folders with names like clip_5_nyx3 and clip_6_nyx3. clip_5_nyx3 is empty.

Low priority. More concerning how it got added than the results.

Does this work in the Resolve plugin?

I only get nyx 2 working.

Not yet, but will be added to the Resolve and After Effects plugins for the main release.

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Upon testing the Nyx3 model, I’ve noticed it doesn’t significantly differ from version 2. It tends to produce a somewhat plastic appearance with noticeable small squares and black dots in 1080p video exports. It seems this model could benefit from further refinement to eliminate the plastic-like effect in the final output.

Can you share 5 second source clips where the model creates these plastic-like effect? Was the model used on auto, and if not, what model parameters were used?

Nyx 3 has the same naming bug as Nyx Fast: “Reduce Large Grain” does what “Recover Details” does in Proteus. It does not reduce large grain.

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In our testing, we find that Nyx 3 has significantly better quality than Nyx Fast. In certain situations, especially with high noise, Nyx Fast results may have some flicker in the dark areas which Nyx 3 does not. Nyx Fast is designed to be a faster version of Nyx, and it does trade off some quality for speed and should be used when run time is a priority. The recommendation would be to first try Nyx Fast and then switch to Nyx 3 if the quality is not up to the level desired.

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