VHS - Is this Halo or Ringing?

[Miranda]

I'm seeing this on scenes againt bright backgrounds - is it rining or haloing? Any suggestion as to removing it?

I have tried the two DeRing options (both did not work), but am unsure which settings to use.

[Selur]

From the screenshot I would say it's haloing.
https://forum.selur.net/thread-1946.html might be interesting.
If your source already has these make sure to resize after you removed them not before.

Any suggestion as to removing it?

Based on a screenshot: No.

Cu Selur

[shijan]

I noticed that in most cases DeRing should be applied to drawn animation and DeHalo to movies content.

Visually DeRing removes only bright outline artifacts.

DeHalo removes dark and bright blurry-like effect.

DeHalo is not friendly for animation content because it thinks that black lines is a halo and distort them.

Sometimes both DeHalo and DeRing may be applied.

Subjectively FineDeHalo produce the best result and intrioduse less additional artifacts.

Do not attempt 100% remove halo artifacts. This will require too strong filtratioin and so filtered movie will look ugly in other way after filtration.

Halo size may be different across different parts of the movie so you need to look for some universal not-too-strong-not-too-weak settings.

[Miranda]

Link to a 1982 VHS PAL captured as DV short clip. The show was shot on video.

I need to keep the interlacing, de-halo and then upscale to 1080i 59.94 (using the same method as previous). I have tried various settings in de-halo and de-ring, but I am unable to remove the outer haloing/ghosting.

I have tried noise removal using MCDegrainSharp at level 2 which looks OK, but the haloing looks worse when upscaled.

What would be the correct workflow, to keep the interlacing?

Any suggestions?

[Selur]

For dehalo try using a higher radius and increase the bright strength (2nd strength control)

clip = havsfunc.DeHalo_alpha(clip, rx=3.00, ry=3.00, brightstr=1.50)

(you might want to adjust the radius)

Cu Selur

[Miranda]

Thanks. I will try.

Also, do I need to use the same interlace settings for the Interpolated 59.94 output, or should I do the interpolation when I do the upscale?

[Selur]

You are not increasing the frame rate so no interpolation is needed,...

[Miranda]

I've tried de-haloing etc, but I can't seem to remove the outer noise, which appears along the right edges. The only filter I managed to get to work was RemoveDirt, which softened the overall image. I also tried deCrawl and a few other filters. 

sample clip

[Selur]

I've tried de-haloing etc, but I can't seem to remove the outer noise, which appears along the right edges. The only filter I managed to get to work was RemoveDirt, which softened the overall image..

Have tried restricting filters using a mask?
Have you tried some degrain filters?

Maybe:
1. AutoWhite + BasicVSR++ (on Chroma only): https://imgsli.com/MjgwNTk0
2. + SMDeGrain + 2xYAHR: https://imgsli.com/MjgwNTk1
also moving SMDeGrain above BasicVSR++ might be good too, adding some grain add the end will help with the general lack of detail in the clip.
Background could also be cleaned up using some level masked denoising.


Cu Selur

[Miranda]

Thanks, will try these.

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Is BasicVSR++ a special add-on?