Avisynth: Bilinear Resize or Bicubic?
 

Hi all...

I know many people use Bicubic Resize due to sharpening the image. However in my eyes it creates pretty ugly artifacts sometimes, and also increases filesize. Is there another reason to use Bicubic that I don't know about? I like to lower the MergeLuma in the current script to a value between 2 and 2.5, and use Bilinear Resize instead. It's softer, but you gain the sharpness by lowering the MergeLuma again. any opinions on that?

I use Bilinear nearly every time. It's faster and recommended when downsizing. When upsizing, a soft Bicubic (=no b and c parameters entered) is a good choice if you don't want that extra sharpness.

Re: Bilinear Resize or Bicubic...
 

Ugh?? You might say "0.2" ? Don't you ?

I really find that bilinear lose too much details. I remind a sample with a man not well shaved. After a "biliearresize" you can't see the beard anymore. "Lanczos" or "Bicubic" didn't have the same problem.

I also tried Bicublin resize but the results were worst than with Lanczos (to much artifacts).

Re: Bilinear Resize or Bicubic...
 

sure I mean between 0.2 and 0.25... :oops:

hi friends.
:)
i try to use bilinear and don't remember the reason
that i change to bicubic. maybe i saw some wrong...

i remember that when i was encoding "monsters sa" i change it.
lanczos is really sharpen and i see without doubts great and
stranges artefacts in the images, then i change to bilcubic.

just like Boulder wrote, bicubic goes to 0.6 max.

lanzos to goes 0.7 max, it give a big sharpness,
but gives simbilances in moviments around the picture.
you will see little waves round the objects or moviments.

:wink:

I've been using Bilinear and things are soft but not blocky and jaggy which is good.

What is the best for upsizing for retaining sharpness and picture quality?

Thanks! :)

Bicubic ;)

-kwag

Thanks as always Kwag. :D

@kwag
Why was GripCrop removed from the optimal script?

GripCrop works only with "AviSynth 2.0x". It has been removed from new "latest script" to use with "AviSynth 2.5x" :wink: .

I'm still thining about this...
There seem to be some encodes, where Bicubic looks brilliant, but on some sources there seem to be problems with it. I get ugly artifacts around objects, and I don't see a way to get rid of them...

I'd like to know some more about Bicublin Resize... experiences?