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How would you treat this interference noise in a video?

 
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RobertP



Joined: 01 Aug 2013
Posts: 33

PostPosted: Sun Dec 15, 2013 3:44 pm    Post subject: How would you treat this interference noise in a video? Reply with quote

Trying to remedy a specific kind of noise in a video, this horizontal banding that looks like electrical interference of some sort. Not talking about the interlace combing but rather the background banding. Below is a screen shot and a link to a short .mpg example.

Original

http://forum.videohelp.com/attachment.php?attachmentid=22100&d=1387078276

After my initial effort to treat with NV, the banding is still there.

http://forum.videohelp.com/attachment.php?attachmentid=22101&d=1387078341

Short video example - 3.79 mb

http://forum.videohelp.com/attachments/22105-1387084716/noise%20sample2.mpg
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NVTeam



Joined: 01 Sep 2005
Posts: 2237

PostPosted: Sun Dec 15, 2013 4:11 pm    Post subject: Reply with quote

I would try to build a noise profile using a large area including those waves, then would enable Very Low Freq option, probably increase the Low Freq Noise Level, play with the temporal filter radius too.

Vlad
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noise reduction for video and photos
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Zach



Joined: 01 Jun 2013
Posts: 38

PostPosted: Fri Mar 14, 2014 6:57 pm    Post subject: Reply with quote

Sorry this reply is so late, hopefully you figured this out already but I wanted to reply so that people didn't end up confused by what they were seeing vs what you reported.

Your clip is either Interlaced. Or Possibly a mix of Interlaced + Telecine as well.

I found that out with 5 minutes of playing around in MeGUI using DGindex and various deinterlacing techniques.

There are still some combing artifacts but I was able to produce an image almost devoid of combing, vs all the combing your screenshots showed.

You probably just need to fiddle around with something like Avisynth and a very good (i.e slow) decomb filter.
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