View Full Version : How to remove Yellowish type of colors from a source?
K!ller
18th November 2009, 00:24
guys can anyone tell me which filter is good for removing yellowish and orange type of color from a source...Thanks!
I am talking about this kind of yellowish...
http://i46.tinypic.com/5bb9ci.png
K!ller
18th November 2009, 00:54
and I wanna know how to remove those little dots in the picture u see...I think you call it noise or something like that...Thanks!
Inspector.Gadget
18th November 2009, 01:57
Your source does not look noisy at all. Please tell us what the source is and post an unprocessed source sample cut from the original.
n0an
18th November 2009, 05:53
What movie is that? That is not noise. I believe the movie is shot with HD equipments and the grain is there to preserve minute details. If you want you can try DegrainMedian() or RemoveGrain() for it, or use FFT3Dfilter(sigma=0.3) for it. For colors, use ChannelMixer() or YlevelS. Note that ChannelMixer only works in RGB colorspace, so use ConvertToRGB(), ColorMixer(), ConvertToYV12() one after another.
Didée
18th November 2009, 08:03
For colors, use ChannelMixer() or YlevelS.
Funnily, the YlevelX() filters work exclusively on luma. They don't touch chroma at all.
n0an
18th November 2009, 14:35
Funnily, the YlevelX() filters work exclusively on luma. They don't touch chroma at all.
Hmmm... What else could one use to fiddle with all channels?
Didée
18th November 2009, 16:17
Par examplé, the whole plentitude of dedicated chroma filters? - ColorYUV, Tweak, RGBadjust, ExpSat, ... maybe even manually / LUT-style via MaskTools. Whatever suits your needs.
Just not YlevelsS/G/C, since these functions do exactly *nothing* with the chroma planes.
After all, that's what the "Y" in Ylevels is standing for: Just for the Y channel. Not for U, not for V.
n0an
18th November 2009, 23:11
Sounds good. Will try them out.
K!ller
20th November 2009, 00:12
Ok guys I have the unprocessed source sample for you to look at...http://www.sendspace.com/file/ht20yt
Mug Funky
20th November 2009, 00:31
um... it's meant to look yellow.
the noise is film grain.
any movie made in the last 10+ years will have considered colour decisions in it, made by the director and cinematographer. what ends up on the disc is (usually) exactly what the film makers intended.
sorry, but i'd be a little bothered if people were changing my colour grades when they ripped the disc.
btw, to steer the colour away from yellow, just add blue, yellow's opposite. RGBadjust(1,1,1.5,1) would give a significant blue shift. just realise you'd have to adjust every scene in the film differently, and you'll be subtly altering the effect the movie has on you (different colours evoke different states of mind - these are deliberately chosen by the camera and art departments and finalised in post production)
K!ller
20th November 2009, 00:57
um... it's meant to look yellow.
the noise is film grain.
any movie made in the last 10+ years will have considered colour decisions in it, made by the director and cinematographer. what ends up on the disc is (usually) exactly what the film makers intended.
sorry, but i'd be a little bothered if people were changing my colour grades when they ripped the disc.
btw, to steer the colour away from yellow, just add blue, yellow's opposite. RGBadjust(1,1,1.5,1) would give a significant blue shift. just realise you'd have to adjust every scene in the film differently, and you'll be subtly altering the effect the movie has on you (different colours evoke different states of mind - these are deliberately chosen by the camera and art departments and finalised in post production)
can you give me plugin for RGBadjust bro coz I just tried and it gave me error in Megui?Thanks!
n0an
20th November 2009, 01:24
It's an internal filter.
http://avisynth.org/mediawiki/RgbAdjust
Gavino
20th November 2009, 02:04
can you give me plugin for RGBadjust bro coz I just tried and it gave me error in Megui?Thanks!
Probably you need to add ConvertToRGB(), since RGBAdjust() requires (surprise, surprise) an RGB clip.
K!ller
25th November 2009, 00:39
guys i have another source which is kind of like this one...some parts are yellowish...
http://i47.tinypic.com/2145l48.png
http://i46.tinypic.com/29ve1l1.png
I will soon post the unprocessed original sample for you guys to look at...Thanks!
manono
25th November 2009, 07:25
You were already given the RGBAdjust filter to use to correct incorrect colors (if they even need correcting). Why are you coming back with the exact same question? Better, I think, would be for you to learn how to get rid of the godawful ugly Shemaroo logo.
smok3
25th November 2009, 10:38
the noise is film grain.
you sure? i'd say this is shot on video using some sort of DOF converter with rotating projection plate (and here is where grain happens).
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