Haloing problem

[Andreselos]

Hello guys, I have a problem to remove this artifact that I believe is halo, correct? I tried in every way all possible combinations, Alpha_dehalo, FineDeHalo etc.. and nothing works, at most it's a small decrease, has anyone gone through this and have a solution?
Thanks.

[Attachment 65280 - Click to enlarge]

[Attachment 65283 - Click to enlarge]

[Selur]

Could also be chroma ghosting,... -> post an short unprocessed (= no deinterlacing, filtering etc. applied) sample

[Andreselos]

15 second video.

sample.mkv

[jagabo]

For the negative ghost try:

Overlay(last, last, x=14, opacity=0.03)

[Selur]

Nice catch jagabo !

before:

after:


I used VapourSynth with

clip = havsfunc.Overlay(base=clip, overlay=clip, x=14, opacity=0.03, planes=[0])

which should do the same as jagabo AviSynth call, aside that I only overlayed the luma channel.

Cu Selur

[Andreselos]

thanks for helping me, is there any way to improve even more without losing details, or is it the most you can get?

[johnmeyer]

I am amazed that jagabo (who is brilliant, BTW) was able to get any improvement at all. While haloing is a very common problem, it is extremely difficult to fix because both the detection AND the fixes are difficult. With two tall hills to climb, more often than not you make everything look worse.

A LOT worse.

Detection is especially difficult in this case because of the stage lighting. Is the purple highlighting on his back and the top of his right shoulder a halo, or is it from a kicker light behind him? I can give other examples, but that one is the most obvious.

As another example of why it is difficult, there is obviously some haze (what are they smoking in the audience these days?) and when you have a spot on a performer, which is clearly the case here, that spot can throw a shadow into that haze. In fact, that may be what you are seeing, in which case it shouldn't be fixed because it belongs there.

So I'd take Jagabo's excellent, if rather slight, improvement, run with it, and enjoy the concert.

[Andreselos]

I am amazed that jagabo (who is brilliant, BTW) was able to get any improvement at all. While haloing is a very common problem, it is extremely difficult to fix because both the detection AND the fixes are difficult. With two tall hills to climb, more often than not you make everything look worse.

A LOT worse.

Detection is especially difficult in this case because of the stage lighting. Is the purple highlighting on his back and the top of his right shoulder a halo, or is it from a kicker light behind him? I can give other examples, but that one is the most obvious.

As another example of why it is difficult, there is obviously some haze (what are they smoking in the audience these days?) and when you have a spot on a performer, which is clearly the case here, that spot can throw a shadow into that haze. In fact, that may be what you are seeing, in which case it shouldn't be fixed because it belongs there.

So I'd take Jagabo's excellent, if rather slight, improvement, run with it, and enjoy the concert.

the impression it gives is that the light hits his shoulder and makes everything clearer, I don't believe it's "halo", this show is from 1990 as old as it is, it's fascinating how amateur footage like that does better than a lot pro-shot around the same time, the problem is that I'm going to upscale this show with VEAI, and any apparent halo intensifies, but ok I think it's better to keep it that way, I never got around to removing those damn halos hahaha, Thank u for helping me, I've been racking my brain for weeks with this video..

[ConsumerDV]

I am not sure which halo is being discussed. The color one?

[Selur]

I am not sure which halo is being discussed

the dark halo on the right.

[lollo]

I am not sure which halo is being discussed. The color one?

Difficult to qualify the problem in that video. Jagabo addressed it as a "ghosting", with a similar approach he used here for a much more evident ghosting: https://forum.videohelp.com/threads/405927-Ghost-on-analog-capture

the problem is that I'm going to upscale this show with VEAI

For that kind of material the real problem is using Topaz VEAI. Good luck!

[Andreselos]

I am not sure which halo is being discussed. The color one?

Difficult to qualify the problem in that video. Jagabo addressed it as a "ghosting", with a similar approach he used here for a much more evident ghosting: https://forum.videohelp.com/threads/405927-Ghost-on-analog-capture

the problem is that I'm going to upscale this show with VEAI

For that kind of material the real problem is using Topaz VEAI. Good luck!

Yes friend, everything intensifies with veai, but what can I do, I have a channel focused on that, taking advantage of the topic, is there anything I can do to fix these lines around the edges?

15 second video!

sample2.mkv

I know there are many other problems in this video, but the only one I can't deal with is these lines.

Thanks in advance!

[Selur]

Just to be sure:

(used DPIR denoise strength 15 for clean-up of the general noise&co)
What are you refering to when you write 'these lines' the lines at A or B?
Or other lines? Best make a PNG screenshot and mark what you mean.

Cu Selur

[lollo]

used DPIR denoise strength 15 for clean-up of the general noise&co

Nicely done without loosing details!

[Andreselos]

Just to be sure:

(used DPIR denoise strength 15 for clean-up of the general noise&co)
What are you refering to when you write 'these lines' the lines at A or B?
Or other lines? Best make a PNG screenshot and mark what you mean.

Cu Selur

[Attachment 65305 - Click to enlarge]

Ok thanks, and here some examples.

[lollo]

Seems similar to first sample. Give to jagabo Overlay approach a try. But lines highlighted by Selur are also ugly, halos + chroma bleeding

[Andreselos]

ok i will try when i get home!

[Selur]

The overlay trick will not work with those. But DeHalo_Alpha even at default settings should lessen the intensity of these.
Problem is to remove the halo while keeping general sharpness, so masking+dehalo might be a good approach.

[VoodooFX]

Try DeHalo_alpha()

[Andreselos]

The overlay trick will not work with those. But DeHalo_Alpha even at default settings should lessen the intensity of these.
Problem is to remove the halo while keeping general sharpness, so masking+dehalo might be a good approach.

hey selur, why doesn't "DPIRdenoise" appear in the hybrid for me?

[Selur]

@Andreserlos: That's simple it's part of the torch-Addon for Hybrid which is ~12GB and too large to host it for the general public. Also requries an NVIDA gpu prederably with 8GB or more RAM. If you got an NVIDIA gpu, I can send you links to my current dev and the current torch-Addon version.

this is what DeHalo_alpha does at default settings:

(removes tons of 'light' halos, but the stronger ones are still there)

[Andreselos]

@Andreserlos: That's simple it's part of the torch-Addon for Hybrid which is ~12GB and too large to host it for the general public. Also requries an NVIDA gpu prederably with 8GB or more RAM. If you got an NVIDIA gpu, I can send you links to my current dev and the current torch-Addon version.

Too bad I have an AMD RX 5700 XT
but this torch-addon is only for nvidia?
maybe there are other plugins that can work for me or not?

[Selur]

Sorry, at least I got no addon bundle for AMD cards.
https://github.com/HolyWu/vs-dpir itself could be used through oxrunntime and DirectML which should also run on AMD cards, but I have no experience setting up a Vapoursynth environment that would work with AMD cards and all the suff vs-dpir depends on.
MC Temporal Denoise with 'very high' is somewhat similar to DPIR.

[Andreselos]

Sorry, at least I got no addon bundle for AMD cards.
https://github.com/HolyWu/vs-dpir itself could be used through oxrunntime and DirectML which should also run on AMD cards, but I have no experience setting up a Vapoursynth environment that would work with AMD cards and all the suff vs-dpir depends on.
MC Temporal Denoise with 'very high' is somewhat similar to DPIR.

I understand then I'll do a search.
about Alpha_Dehalo I've tried in every way to remove these lines, with dehalo, dering, LGhost etc.. without success

[Selur]

try: YAHR and MCTemporalDenoise

# denoising using MCTemporalDenoise
clip = havsfunc.MCTemporalDenoise(i=clip, settings="very high", ncpu=1)
# applying dehalo using YAHR
clip = havsfunc.YAHR(clip, blur=10, depth=48)

and try tweaking the settings of both YAHR and MCTemporalDenoise.
Here also a screenshot of DPIR+YAHR:

(not that much of a difference)

Cu Selur

Ps.: mainly adjusting the blur and depth value of YAHR should help with these halos, but remember to also check the other scenes. Strong dehalo can really mess with stuff.

[Selur]

btw. there are some strong dark halos in some scenes, I doubt you can get rid of those,..
Also depending on your time and motivation you might want to filter by scene.

[Andreselos]

try: YAHR and MCTemporalDenoise

# denoising using MCTemporalDenoise
clip = havsfunc.MCTemporalDenoise(i=clip, settings="very high", ncpu=1)
# applying dehalo using YAHR
clip = havsfunc.YAHR(clip, blur=10, depth=48)

and try tweaking the settings of both YAHR and MCTemporalDenoise.
Here also a screenshot of DPIR+YAHR:

(not that much of a difference)

Cu Selur

Ps.: mainly adjusting the blur and depth value of YAHR should help with these halos, but remember to also check the other scenes. Strong dehalo can really mess with stuff.

Ok!

[Andreselos]

Ok thanks a lot, i change to blur 1 on YAHR, and apparently the other scenes are also much better..


[Attachment 65314 - Click to enlarge]

[Andreselos]

btw. there are some strong dark halos in some scenes, I doubt you can get rid of those,..
Also depending on your time and motivation you might want to filter by scene.

yes really, as it's a short video maybe I'll do scene by scene, what is the best way to remove these dark halos?

[Selur]

what is the best way to remove these dark halos?

No, clue that is why I wrote: "I doubt you can get rid of those,.."