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View Full Version : 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?
https://i.postimg.cc/qhxydHnH/Dom-Dup-comparison.png (https://postimg.cc/qhxydHnH) https://i.postimg.cc/R65hpJJP/s-video.png (https://postimg.cc/R65hpJJP)

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
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/realfinder/AVS-Stuff/master/avs%202.5%20and%20up/AdvancedDenoising.avsi
jefix
20th July 2022, 06:55
SaurusX, thank you so much! I will definitely try it out.