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View Full Version : what kinds of de-noise filter should use to remove such a noisy source

adrianmak
3rd July 2007, 03:21
I used a TV card to record a tv programme and the tv signal is not pretty good. It is a little bit noisy
http://i108.photobucket.com/albums/n16/adrianmak/Snap1-77.jpg

What kinds of filter to remove such noisy source ?
yup
3rd July 2007, 07:25
Hi adrianmak!
Try MVDegrain1 or MVDegrain2 from MVTools plugin.
and also try use antenna preamplifier :).
yup.
hellsings
3rd July 2007, 08:19
Hum maybe you should try RemoveNoiseMC :)
adrianmak
3rd July 2007, 11:02
Hum maybe you should try RemoveNoiseMC :)

What's removenoisemc ??
nullstuff
3rd July 2007, 11:08
RemoveNoiseMC -> http://forum.doom9.org/showthread.php?t=110078

-- nullstuff
Dark Shikari
3rd July 2007, 17:50
FFT3DFilter on some very powerful settings could work.
adrianmak
4th July 2007, 00:35
RemoveNoiseMC -> http://forum.doom9.org/showthread.php?t=110078

-- nullstuff

I tried and got bad result
yup
4th July 2007, 04:17
adrianmak!
Try MVDegrain2i.
http://forum.doom9.org/showthread.php?p=988154#post988154
Work slowly but give good result.
yup.
adrianmak
4th July 2007, 04:54
What is the right order to perform following steps
de-interlace
de-noise
sharpening
resize
EuropeanMan
4th July 2007, 08:41
IMHO

deinterlace
resize
(colormatrix, tweak, ylevels, etc etc)
denoise
sharpening
Dark Shikari
4th July 2007, 11:38
IMHO

deinterlace
resize
(colormatrix, tweak, ylevels, etc etc)
denoise
sharpening
Wouldn't you want to do a denoise before resizing, as the resizing interpolation would make denoising much more difficult?
adrianmak
4th July 2007, 12:14
Wouldn't you want to do a denoise before resizing, as the resizing interpolation would make denoising much more difficult?

That's means better do a de-noise before resizing ?
Dark Shikari
4th July 2007, 12:50
That's means better do a de-noise before resizing ?
I would, personally, at least.
Didée
4th July 2007, 14:57
In this case here, it shouldn't matter too much. With so much noise, the deinterlacer will be sufficiently fooled and use spatial interpolation almost everywhere. This means that all the noise already has been spatially interpolated before the resizer even gets its hands on the content.

Theoretically, it should be better to denoise the interlaced stream first, then do the deinterlacing (needs interlacing-aware filters, of course). Only when the interlaced stream has cleaned, the deinterlacer will be able to do a "reasonably" job.
When deinterlacing first, you'll end up with a result that's very close to just discarding one field.