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View Full Version : What filter to remove these artifacts? (DV-material)


bananacreamandpeca
15th December 2006, 02:19
This is a snapshot of my DV recorded material.
As you can see it has pink/red and yellow "smear" all over the place (look at the wooden floor)

http://i11.photobucket.com/albums/a158/alcappuccino/yellpinksmear.jpg

I tried the doom9-guide to recognize the artifacts.
And tried a few filters:
CNR2
GuavaComb
ChromaShift

They do not seem to help.
Any ideas how to get rid of them??

Pookie
15th December 2006, 04:36
Try

fft3dfilter(plane=3, sigma=5,interlaced=true)

tweak sigma value to taste

Boulder
15th December 2006, 16:06
You could also try tweaking the different sigmas and see which one of them affect the artifacts, unless you wish to use the same settings for all frequencies.

El Enmascarado
20th December 2006, 07:10
What causes these artifacts? Can this be fixed before getting it into the computer? By the way I don't see much wrong with the image do you mean the shoes ties have a tendency to purple? Maybe the tape is not humid enough.

Mug Funky
22nd December 2006, 04:52
DV cameras seem to do this. i'm not sure if it's the DV codec or the processing or not, but it happens a lot.

you can kill it quite easily with temporalsoften(1,0,2) (maybe tweak it a little). it seems to be a rounding issue in the U and V channels. smoothing the chroma is almost totally unnoticable, and will kill these artefacts without really touching anything else.

bananacreamandpeca
31st December 2006, 18:56
Thanks for the replies Guys!
FFt3DFilter washed them away instantly.
But then I got these yellow streaks on the white parts of the sneakers.
I left it that and just saved it to mpeg-4. I'm tired of video.

theReal
4th January 2007, 01:59
DV cameras seem to do this. i'm not sure if it's the DV codec or the processing or not, but it happens a lot.

The better your camcorder the less you will get it - I guess it solely depends on the quality of the lens and chips. I shoot a lot with a DVCAM pro camcorder at work (2/3" 3-chip) and even with a "cheap" news-type lens it won't produce that kind of color aberrations. DVCAM uses the same software codec as DV, so it can't be a DV error.