I have to remove aliasing from this anime, is it possible?

[Myfigure]

I have to remove aliasing from this anime, is it possible?

Example:



With maa, naa3 or daa I have always this aliasing. It's strange...

Thanks in advance.

[Mister Hatt]

They don't work because that isn't aliasing.

[mirkosp]

The issue is that the aliasing was amplified by the bad upscale, so the antialiasers have a harder time recognizing the aliasing there.
You first downscale to 720p with spline36resize and then use naa3. That should work.

[Mister Hatt]

I don't think naa is the right one to use there to be honest. If you really want to AA it after downscaling, I would think supaa might do a better job, followed by EE or contrasharpening for some postprocessing I guess. If you reverse the upscale with the same technique that was used to get it to that state, you won't really need to fix aliasing anyway as I don't think aliasing was all that prevalent in the original source to begin with.

[Myfigure]

I with spline36resize to 720p and simply with naa3() I have this:



For you is it ok?

[Mister Hatt]

I don't think using naa or spline36 is a good idea. That said, it obviously didn't work. naa was never designed for HD (and before anyone argues, I wrote it so I know what it was designed for) and cannot handle that kind of aliasing in the first place. Spline36 is also far too sharp. I think your best bets are lazymodo'ing with maybe bicubic resizing and trying supaa() with possibly some contrasharpening or EE to clean up if it seems a bit blurry, or otherwise pointresizing to an anamorphic scale and using daa to clean it up before re-upscaling it yourself. Content isn't HD anyway so it's not like you'd lose detail, just a bit of sharpness. Kinda obvious how they upscaled that anyway so undoing it shouldn't be too difficult.

[Myfigure]

Thank you very much!
But where can I find supaa?

[mirkosp]

If you downloaded the AMVApp 3.1, it's with the other plugins for avisynth (or at least, it should be).

[Mister Hatt]

If it isn't, I'll dig up my scripts from somewhere. Will probably be different to the one everyone else has seeing as some idiot on Doom9 butchered it but would work better anyway.

[mirkosp]

Code: Select all

FUNCTION supaa(Clip Clp,Int"SS",Bool"CP")
{

OX = Clp.Width
OY = Clp.Height
SS = Default(SS,2)
CP = Default(CP,True)


Clp = Clp.IsYV12() ? Clp : Clp.ConvertToYV12()

Clp.nnedi2_rpow2(rfactor=SS,cshift="spline36resize",qual=3).SangNom().TurnRight()
\  .SangNom().TurnLeft().Spline36Resize(OX,OY)

CP ? Last : MergeChroma(Clp)

Return(Last)

}

Is the original you wrote.