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Old 28th June 2010, 15:12   #1  |  Link
xv
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Remove yellow/blue spots from DV

I got several DV sources that contain this chroma artifacts with yellow and blue spots. I attached an example, sometimes the spots are even more visible, thatīs average.
Is there any good method using VirtualDub and/or AviSynth filters to remove that artifacts?
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Last edited by xv; 28th June 2010 at 21:25. Reason: grammar fix
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Old 29th June 2010, 10:41   #2  |  Link
2Bdecided
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I think it's the remnants of the debayering in the camera itself. It becomes most visible in low light IME.

I've never managed to remove it satisfactorily - I tried taking a noise print in neat video, which in theory should target this quite well, but I needed stupidly high settings to get rid of it - by which time some genuine chroma details were also affected.

I'd be interested in a solution too.

I think this thread might be better in the AVIsynth forum - it's not necessarily DV specific (even though your source was DV).

Cheers,
David.
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Old 29th June 2010, 20:23   #3  |  Link
communist
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FFT3DFilter on plane 3 (both chroma planes) with strong sigma values - I'm sure there are better ways but worked good enough for me yet
FFT3DFilter(sigma=25.0,plane=3)
or
FFT3DFilter(sigma=10,plane=3)
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Old 29th June 2010, 23:08   #4  |  Link
Wilbert
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Try Cnr2 or GuavaComb.
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