Removing analog artifacts from video

jefix · 13th July 2022, 08:57

Hi. Is there a software or hardware way to get rid of these artifacts?

The problem doesn't seem to be with the capture card. I think the signal is already encoded that way on the laser disk.

I've tried googling but can't find anything.

This problem shows up the most during the intro like in the picture. I already feel like I have to recreate these segments of video from scratch.

StainlessS · 13th July 2022, 10:21

Post on Postimage.org, attachments can take forever.

"How To Upload Pictures":- https://forum.doom9.org/showthread.php?t=183538

Emulgator · 13th July 2022, 19:45

Convolution can be used to get rid of these echoes/ghosts/halos, lots of manual tuning involved.
https://forum.doom9.org/showthread.php?t=182604

jefix · 14th July 2022, 05:32

Quote:

Originally Posted by Emulgator

Convolution can be used to get rid of these echoes/ghosts/halos, lots of manual tuning involved.
https://forum.doom9.org/showthread.php?t=182604

Thank you! Can you tell me what analog source you used this for? Should I do noise reduction and de-interlace first? Is there any chance that if I set up this script for one laserdisc, it will work for most?

Emulgator · 14th July 2022, 17:33

All is laid down in great detail within the script.
(I wrote it in German, and you may use a translation machine for that.)
It was for a crappy VHS capture 3rd generation, so you can not copy coefficients from that occasion.
Restoration sequence: Undo any faults in reverse order as they were introduced.
Think about your particular case's original signal chain and you'll find out.
First processing should work along CVBS temporal scan, so along x-axis from left to right and then to the next line, so I would call deghosting first.
Then deinterlacing (QTGMC) and if still needed, then noise reduction and whatever you may consider helpful.

SaurusX · 19th July 2022, 16:09

Edgesidebleed() can reduce that horizontal smearing. You just need to tweak the parameters depending on how far the streaks are extending and how intense they are. You can't get it perfect, but it will be greatly improved.

https://raw.githubusercontent.com/re...Denoising.avsi

jefix · 20th July 2022, 06:55

SaurusX, thank you so much! I will definitely try it out.

13th July 2022, 08:57	#1 \| Link
jefix Simple User Join Date: Jul 2022 Posts: 5	Removing analog artifacts from video Hi. Is there a software or hardware way to get rid of these artifacts? The problem doesn't seem to be with the capture card. I think the signal is already encoded that way on the laser disk. I've tried googling but can't find anything. This problem shows up the most during the intro like in the picture. I already feel like I have to recreate these segments of video from scratch. Last edited by jefix; 13th July 2022 at 10:27.

13th July 2022, 10:21	#2 \| Link
StainlessS HeartlessS Usurer Join Date: Dec 2009 Location: Over the rainbow Posts: 10,877	Post on Postimage.org, attachments can take forever. "How To Upload Pictures":- https://forum.doom9.org/showthread.php?t=183538 __________________ I sometimes post sober. StainlessS@MediaFire ::: AND/OR ::: StainlessS@SendSpace "Some infinities are bigger than other infinities", but how many of them are infinitely bigger ???

13th July 2022, 19:45	#3 \| Link
Emulgator Big Bit Savings Now ! Join Date: Feb 2007 Location: close to the wall Posts: 1,469	Convolution can be used to get rid of these echoes/ghosts/halos, lots of manual tuning involved. https://forum.doom9.org/showthread.php?t=182604 __________________ "To bypass shortcuts and find suffering...is called QUALity" (Die toten Augen von Friedrichshain) "Data reduction ? Yep, Sir. We're that issue working on. Synce invntoin uf lingöage..." Last edited by Emulgator; 13th July 2022 at 19:48.

14th July 2022, 17:33	#5 \| Link
Emulgator Big Bit Savings Now ! Join Date: Feb 2007 Location: close to the wall Posts: 1,469	All is laid down in great detail within the script. (I wrote it in German, and you may use a translation machine for that.) It was for a crappy VHS capture 3rd generation, so you can not copy coefficients from that occasion. Restoration sequence: Undo any faults in reverse order as they were introduced. Think about your particular case's original signal chain and you'll find out. First processing should work along CVBS temporal scan, so along x-axis from left to right and then to the next line, so I would call deghosting first. Then deinterlacing (QTGMC) and if still needed, then noise reduction and whatever you may consider helpful. __________________ "To bypass shortcuts and find suffering...is called QUALity" (Die toten Augen von Friedrichshain) "Data reduction ? Yep, Sir. We're that issue working on. Synce invntoin uf lingöage..." Last edited by Emulgator; 14th July 2022 at 17:38.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

19th July 2022, 16:09	#6 \| Link
SaurusX Registered User Join Date: Feb 2017 Posts: 124	Edgesidebleed() can reduce that horizontal smearing. You just need to tweak the parameters depending on how far the streaks are extending and how intense they are. You can't get it perfect, but it will be greatly improved. https://raw.githubusercontent.com/re...Denoising.avsi

20th July 2022, 06:55	#7 \| Link
jefix Simple User Join Date: Jul 2022 Posts: 5	SaurusX, thank you so much! I will definitely try it out.