Removal script for ghosts or halo effects?

[banaguitar]

Hi,

is there any way to remove this halo and ghost effect?

https://drive.google.com/file/d/1j_T...ew?usp=sharing

I played the tape on different vcr and everywhere the same halo and ghost effect.

[lordsmurf]

Avisynth can probably tackle much of that, maybe all.

I can't help with writing that script right now, so defer to some of our other members here, like lollo2 of themaster1. Maybe PM them, ask them to help you in this thread. Not in PM, but in the thread, so we can all see the script.

[banaguitar]

Thank you lordsmurf

And here is the raw sample

[lollo2]

First of all you should try a new capture without any sharpening set active in the VCR or in the "capture device". Your sample is DV encoded, so I suspect a camera or an analog to dv converter.

Removing a strong halo always "destroys" the rest of the content; it's true that you can further process the video for removing noise and do some sharpening after the halo removal, but what was lost is lost.
In your sample the defect on the left of the person is very very difficult to process.

Here a quick 2 minutes attempt just to show the principle. The chroma shift is intentionally exaggerated and must be reduced. No deinterlace performed, it should be done because Dehalo_Alpha needs progressive material.
You can try to play with the parameters of the filters, apply Dehalo_Alpha twice with different set of parameters, etc..., but the best is to introduce a mask to preserve the rest of the area and only act on the edges. Again, try to re-capture if the defetcs are not already in the tape.

https://imgsli.com/MTMxMTcy

video_org=DirectShowSource("sample.avi")

# plugins directory
plugins_dir="C:\Users\giuse\Documents\VideoSoft\MPEG\AviSynth\extFilters\"

	# ChromaShift
loadPlugin(plugins_dir + "chromashift27\ChromaShift.dll")

	# Dehalo_alpha
Import(plugins_dir + "Dehalo_alpha\Dehalo_alpha_MT2.avsi")
	# Dither
Import(plugins_dir + "dither-1.28.0\mt_xxpand_multi.avsi")
loadPlugin(plugins_dir + "dither-1.28.0\win32\dither.dll")

	# MaskTools2
loadPlugin(plugins_dir + "masktools2-v2.2.23\x86\masktools2.dll")

### convert to YV16
video_org_yv16=video_org.convertToYV16()

### shifting chroma
video_cs_yv16=video_org_yv16.ChromaShift(C=-10)

### dehaloing
video_dehaloed_yv16=video_cs_yv16.Dehalo_alpha(rx=4,ry=4,darkstr=0.0,brightstr=1.2,lowsens=200,highsens=300)
 
### convert to YUY2
video_restored=video_dehaloed_yv16.convertToYUY2()

#return(subtitle(video_org,"video_org",size=20,align=2))

#return(subtitle(video_restored,"video_restored",size=20,align=2))

#interleave(\
stackhorizontal(\
subtitle(video_org,"video_org",size=20,align=2),\
subtitle(video_restored,"video_restored",size=20,align=2)\
)

comp.jpg

[banaguitar]

Hi, thank you. This looks better!!! I use ADVC-55 with Scenalyzer. I think, there is no way to change any settings here.

[lollo2]

Quote:

This looks better!!!

Well, it depends...

Quote:

I use ADVC-55 with Scenalyzer. I think, there is no way to change any settings here.

Check also the VCRs. Otherwise, it means the halos are in the source.

[banaguitar]

Yes, I played the source tape (betamax) on two different vcr and both the same

[lollo2]

Try to check if there is any "sharpening" setting in the beta VCRs that you can switch off

[Hushpower]

Non-AVISynth... VDub Flaxen VHS and CCD filters, just for the exercise.

https://imgsli.com/MTMxMjYx

[lordsmurf]

Quote:

Originally Posted by Hushpower

Non-AVISynth... VDub Flaxen VHS and CCD filters, just for the exercise.

https://imgsli.com/MTMxMjYx

Nice, but needs some more tweaking. Look at the chin.

[Hushpower]

Chinny chin chin! Yes, noted, LS. A compromise...

[banaguitar]

Quote:

Originally Posted by lollo2

Try to check if there is any "sharpening" setting in the beta VCRs that you can switch off

Hi, unfortunately not, it must be the tape.

[lollo2]

Quote:

Non-AVISynth... VDub Flaxen VHS and CCD filters, just for the exercise.

That's just a cleaning, does not remove the halos

https://imgsli.com/MTMxMjk0

[Hushpower]

Nor does yours, Lollo, look at his right arm. Additionally, your overall image is much softer. There's some pretty severe denoising/smudging going on there.

[lordsmurf]

This is a tricky error. Different restore methods incur different (lesser/better) damage to hide the worse damage.

[lollo2]

Quote:

Nor does yours, Lollo, look at his right arm.

The right arm defect is not a real halo and it's difficult to manage. The evident halos are removed/reduced. Did you look to the images?

Quote:

Additionally, your overall image is much softer. There's some pretty severe denoising/smudging going on there.

That's a price to pay for a quick halo removal. Better tecniques will include edge masking to preserve the general image and focus on the areas where the halos are present, as I already said.
Because the direction this thread is taking, I won't show any of them here.

To the OP: in doom9 forum you had no response to your thread about this query, try to post in Videohelp Restoration forum, somebody like jagabo or poisondeathray will surely help you better than me

[banaguitar]

Quote:

To the OP: in doom9 forum you had no response to your thread about this query, try to post in Videohelp Restoration forum, somebody like jagabo or poisondeathray will surely help you better than me

Ok, thank you. But jagabo does not exist

[Hushpower]

Quote:

But jagabo does not exist

Yes they do. They posted on VideoHelp today.

[banaguitar]

Quote:

Originally Posted by Hushpower

Yes they do. They posted on VideoHelp today.

On videohelp yes

[Hushpower]

Quote:

On videohelp yes

As Lollo said.