How would you treat this interference noise in a video?

questions about practical use of Neat Video, examples of use
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rimage
Posts: 33
Joined: Thu Aug 01, 2013 5:44 pm

How would you treat this interference noise in a video?

Post by rimage » Sun Dec 15, 2013 3:44 pm

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.p ... 1387078276

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

http://forum.videohelp.com/attachment.p ... 1387078341

Short video example - 3.79 mb

http://forum.videohelp.com/attachments/ ... ample2.mpg

NVTeam
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Joined: Thu Sep 01, 2005 4:12 pm
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Post by NVTeam » Sun Dec 15, 2013 4:11 pm

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
Image Image Neat Video team
noise reduction for video and photos

Zach
Posts: 38
Joined: Sat Jun 01, 2013 12:37 pm

Post by Zach » Fri Mar 14, 2014 6:57 pm

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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