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filtering suggestions - Printable Version

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filtering suggestions - KitsuHitsuyy - 23.05.2025

Hi, what VapourSynth filters and settings should I use to mainly get rid of the dropouts, chroma noise, and what would be the best sharpening filter for this source?

https://we.tl/t-78Nj7s2Xgl

RE: filtering suggestions - Selur - 23.05.2025

Away from PC till Monday evening, will look at it then.

RE: filtering suggestions - KitsuHitsuyy - 23.05.2025

Sure, take your time!

RE: filtering suggestions - Selur - 25.05.2025

No clue, what the 'best' is.
How I would approach such a source:
  • throw Retinex at it (while moving it to the end of the filter order) to better see the problems
    [Image: grafik.png]
  • check the interlacing flag (tff seems fine)
  • crop what should be inactive borders of the video
  • check whether the luma scaling is correctly signaled (pc vs. tv scale); seems fine
Due to the severance of the artifacts in this source (multiple times compressed, badly captured) and the general darkness of the source, I would think whether the source luma levels should be adjusted.
Then I would try how Deblocking and some other heavy filters (MCTemporalDenoise, BasicVSR++, SpotLess) influence the output.
Due to the bad shape of the source, there are no details any normal sharpener could emphasize.
[Image: grafik.png]
Assuming you don't plan to change the luma levels (make the whole thing brighter), I would probably use different filters&co on dark and bright areas of the image (= use some luma masking when using filters).
For the chroma you can try using HQDN3D, set luma strength to 0 and just use the chroma denoising.

=> The only thing one can do with such a source is trying to reduce compression artifacts while trying to keep some of the existing details.


Cu Selur

RE: filtering suggestions - KitsuHitsuyy - 25.05.2025

It’s already some improvement, thanks a lot