help me to remove this granulations

[raquete]

hi all.
my sincere excuse about the title of this thread :o because i can't find the right words to explain this granulations in the source.
i got this picture from vdubmod loadind the vob from ripped video_ts folder and the whole movie show seamless granulations,no matter if have heavy light or darkness.

http://img508.imageshack.us/img508/7794/ozzy2iv.th.png (http://img508.imageshack.us/my.php?image=ozzy2iv.png)

please,what kind of filter and adjusts can i use to remove this granulations?
( and how this "granulations" are called? :confused: )

thanks!

[danpos]

@raquete

They seem 'dusts' to me, but I'm not sure about them.

See you,

[Chainmax]

That sure does seem like noise, albeit a lot of it. You should probably try FFT3DFilter on it.

[unskinnyboy]

Please provide a vob sample so we could "play" around with it.

[charleski]

It's film grain from high-ISO stock that's been put through a spatial filter.

[raquete]

here a sample Ozzy.rar (http://rapidshare.de/files/9131188/ozzy.rar.html) 11,4Mb cutted with chopper xp.

thank you all.

[charleski]

There's little you can do to remove this apart from using more spatial/temporal filtering (like FluxSmoothST). TBH you'll probably be better-off just encoding it as-is.

[unskinnyboy]

@raquete, A quick

FFT3DFilter(sigma=6, plane=0, sharpen=0.3)
FFT3DFilter(sigma=6, plane=1, sharpen=0.3)
FFT3DFilter(sigma=6, plane=2, sharpen=0.3)

gave me this:

http://img31.imageshack.us/img31/6154/fft3dfilter5ky.th.png (http://img31.imageshack.us/my.php?image=fft3dfilter5ky.png)

Lot of noise is removed, but so are the details. Not sure if you like the look. You can further play around with the parms as you like.

[Mug Funky]

btw, you might also want to run dedot on this before anything else.

that "spatial filter" the noise has been through is in fact good old fashioned analog composite (which is why there's no vertical blur present).

you might also want to crop the rough edges on the sides, too - that'll hurt compression.

[raquete]

Mug Funky,
i read about and download dedot and searching the forum i saw screenshots with cool results posted but for that bad source that i have give just a few differences.thank you vm.

unskinnyboy,
FFT3DFilter is the best to remove that noises and i'm trying to use msharpen to recover some sharpness/details (msharpen give better result that asharp or warpsharp in my little tests)

the script that i'm testing:

FFT3DFilter(sigma=6, plane=0, sharpen=0.3)
msharpen(2,180) #or (3,150) or (5,180)

:o can you please,encode this few sample with this parameters and tell me what you think?(or any other to recover some sharpness/details)

thank you all in advance and to you unskinnyboy double thanks!
;)

[vcmohan]

I tried to clean the image with Denoise (http://www.avisynth.org/warpenterprises/#denoise) and AdaptiveMedian (http://www.avisynth.org/warpenterprises/#AdaptiveMedian) plugins.
script used is

a=converttoYUY2()
d=DeNoise(a,0,1,xgrid=5,getvar=true,lx=640,rx=700,ty=200,by=240,clip= true, var=50)
AdaptiveMedian(d,0,1,9)

The noise removed is:
http://img227.imageshack.us/img227/2488/grainnoise01dq.th.jpg (http://img227.imageshack.us/my.php?image=grainnoise01dq.jpg)

The cleaned image is :
http://img204.imageshack.us/img204/6452/graindenoised02ls.th.jpg (http://img204.imageshack.us/my.php?image=graindenoised02ls.jpg)
Is this useful?

[Chainmax]

raquete, you might want to check LimitedSharpen (http://forum.doom9.org/showthread.php?t=84196) out, in my opinion it's the best sharpener out there.

[Chainmax]

raquete, you might want to check LimitedSharpen (http://forum.doom9.org/showthread.php?t=84196) out, in my opinion it's the best sharpener out there. You could also try out
DeGrainMedian(limitY=5,limitUV=7,mode=0) for noise removal.

[Didée]

Quick try of some things lying on the workbench:

http://img231.imageshack.us/img231/2361/ozzy210seesawmcnr2sq.th.png (http://img231.imageshack.us/my.php?image=ozzy210seesawmcnr2sq.png)

MC-denoised /w lowpass-protection, piped through SeeSaw. Snail pace, that is.

[Pookie]

SeeSaw? What's that ? ;)

[Chainmax]

Some country thang, yo. Didée be riding with cowboyz ;) :p.

[charleski]

MC-denoised /w lowpass-protection, piped through SeeSaw. Snail pace, that is.
Would be interesting to know exactly what filter settings you used, though 'snail pace' is always the problem with the more sophisticated set-ups.

IMO the most troublesome artifacts in the original (in terms of bitrate needs) would be the checkerboard artifacts seen in the orange areas along Ozzy's left side (particularly the hair and highlights on the arm) - I suspect these are compression artifacts frpm the original MPEG2 encoder.

[vcmohan]

I find considerable difference between the original image posted by raqute and those posted after processing by unskinnyboy and didee. Since there is a lot of shift in objects in the image it may be a different frame?

The image posted by Didee however looks a lot cleaner. Hope the plugins still on the work bench( MC and SeeSaw) will come out into open soon

[Didée]

Well, what I tried was

source = last

x = mcnr_simple2(frames=3,thY=24,thC=20,thY2=-1,thC2=-1,removdirt=true,LPrad=2.0,LPlosens=1,LPhisens=5)

SeeSaw(source,denoised=x,NRlimit=15,bias=32,Smode=11,Szp=25,Sdamp=20,sootheT=-49,sootheS=86) Used script functions are MCNR_simple2 (http://home.arcor.de/dhanselmann/_stuff/MCNR_simple2.rar) and SeeSaw (http://home.arcor.de/dhanselmann/_stuff/SeeSaw_2005.12.15.rar).

Bear in mind that these are "lunchbreak projects" ;) So they may work or not, may contain bugs, melt your PC, etc pp. ... "experimental" / "under construction".

Explaining comments are in the scripts, more I can't offer for now. Be adventurous, or let it be.

[unskinnyboy]

I find considerable difference between the original image posted by raqute and those posted after processing by unskinnyboy and didee. Since there is a lot of shift in objects in the image it may be a different frame?

Mine was a quick run through with FFT3DFilter. Nothing groundbreaking. Yes, it is a different frame since I wasn't sure which frame the screenshot was from. Ozzy stays on like that for a long time.

The image posted by Didee however looks a lot cleaner. Hope the plugins still on the work bench( MC and SeeSaw) will come out into open soon
Yes, of course. That's Didée and this is poor me. :D..These are the situations where we get to see Didée's workbench functions. :)

EDIT: OK, nice. Didée posted his function.

[raquete]

:eek: geeeez
Didée....what is that?!?!? :p maybe i never will understand and can't put it working.give 5 years to learn something and start!
the image is cool but i need something for "newbys" in scripts/filters.

Chainmax
i'm waiting the final of "limitedsharpen" .is one "hard" and complicated lecture .


thank you all. (...2 days that i :readguid: and learn just a few)
;)

[morsa]

I have problems trying to test these too experimental scripts.
Error is incorrect or not supported mode in removegrain plugin or something like that.
If anyone knows what I'm talking about please give me a hint about what plugins are required

[Chainmax]

Didée's experimental version of LimitedSharpen uses RemoveGrain pre-release v1.0 (http://home.arcor.de/kassandro/RemoveGrain/RemoveGrain.rar) rather than the official v0.9. One of the changes is the extra mode=19 switch.

[morsa]

Thank you fellow

[Chainmax]

No problem, pibe :).