High Quality Up-Conversion filter

[audiohominis]

Hi guys. In your experience, what would you consider to be AVISynth filter equivalents closest to commercially available up-scaling plug-ins like InstantHD, BlowUp, Genuine Fractals, etc. The rez of some 640x360p vids need doublin' but I'm looking for something sharper than what the conventional bi-linear, bi-cubic, etc algorithms have to offer.
I looked for some pages comparing images produced with various AVISynth filters aimed at that but couldn't find anything satisfying.
Thank you in advance.

[DarkT]

I think NNEDI 2 or something like that is famous for its "blow up" capabilities?

*shrugs*

[audiohominis]

Thank you for your reply. It looks pretty good.

[DarkT]

;) glad I could help... I'm usually the one who gets helped here :).

Happy new year people, btw :).

[10L23r]

ya nnedi2 is the best upscaler for avisynth... probably better than commercial plugins too.

for linear interpolation... the best would be lanczos and spline

[thetoof]

Don't forget the new (and still in testing) eedi3 - http://forum.doom9.org/showthread.php?p=1343668#post1343668

[audiohominis]

Some pretty impressive de-interlacing results there.

[DarkT]

I tried eedi3 with mixed results... at some places it caught some stuff, at others it performe worse than yadif+nnedi2 / tdeint+nnedi2, but it's certainyl worth a shot ;).

[Blue_MiSfit]

Using nnedi / nnedi2 in double height mode will probably be your best option :)

If you're doing upscaling, you might want to look into some form of noise reduction, and possibly sharpening - though you should probably go easy on them both! Over filtering is always a bad idea.

Take a look at LSFMod for sharpening, and FFT3DFilter / MDegrain are both excellent denoisers. Tune them carefully.

~MiSfit

[Didée]

If you think about what NNEDI actually is doing, you'll come to the conclusion that the result of NNEDI-upscaling *should* be sharpened in some way. Remember that NNEDI is not a scaler, but an interpolator for missing-by-decimation data. In a smooth progressive frame, there is not any data missing in this special way. E.g. a 1-pixel line with 1-pixel antialiasing on either side will be much broader in the upscaled frame than it should be ideally.

orig: 10 10 14 20 14 10 10

NNEDI: 10 xx 10 xx 14 xx 20 xx 14 xx 10 xx 10

Not quite sure how to put this in a few words ... what about "Nyquist interpolation / restoring" ? Those parts of detail that are somehow close to Nyquist frequency in the source frame, those need to be thinned in the NNEDI-upscaled frame.

[DarkT]

Not quite sure how to put this in a few words ... what about "Nyquist interpolation / restoring" ? Those parts of detail that are somehow close to Nyquist frequency in the source frame, those need to be thinned in the NNEDI-upscaled frame.

Sorry man, I lost you at "nyquist" *grins*

But the basic idea is that because NNEDI is trying to restore lost (or missing?) data, and a progressive frame has no lost data, what happens is that some stuff which NNEDI *thinks* is lost data, gets strengthened, I think, no?

[shoopdabloop]

a different "sharpening" mode could be used when dh=true.

[Undead Sega]

If NNEDI is an interpolator and not a scaler (even though it does provide good results) what would be the best upscaling filter in Avisynth (just to help answer the OP's question)?

Can TGMC be used as an upscaler???

[DarkT]

If NNEDI is an interpolator and not a scaler (even though it does provide good results) what would be the best upscaling filter in Avisynth (just to help answer the OP's question)?

Can TGMC be used as an upscaler???

Dude, you used the B word! *awaits for neuron2* *chuckles*

It is an interesting one though... To be honest though, I didn't find much difference between lanczs and nnedi... Maybe I wasn't lookign good enought? *shrugs*

[Undead Sega]

Dude, you used the B word! *awaits for neuron2* *chuckles*

ohhh crap, i totally forgot about that, im not going to edit that post as i will take up for that little typo, what i really meant to say was "what would be the better upscaling filter in Avisynth instead of using conventional resizing methods like Bicubic, Lancz and Spline?"

It is an interesting one though... To be honest though, I didn't find much difference between lanczs and nnedi... Maybe I wasn't lookign good enought? *shrugs*

Are you refering to when i mentioned TGMC as an upscaler? i mentioned that because of its motion-compensated analysis of frame(s) which it naturally yields excellent and 'rich' results. Cant it be using that algorithm for upscaling?

[markanini]

How about HybridFuPP?