[MPlayer-users] Comparison of different software scaler types

[Matthias Wieser]

Am Donnerstag, 16. Oktober 2003 17:34 schrieb Michael Niedermayer:
> > Maybe worth a note: I used gimp 1.3.19 and gimp's bilinear downscale
> > filter looks nearly the same to gimp's bicubic downscale filter. Even
> > at upscale the difference is very small.
>
> is there a difference at all?

Yes, very slight. Some faint colored points are spread over the difference 
image. (Looks like they use ~35 pixel blocks anywhere)

> it seems gimp uses an area averaging
> scaler for downscaling if u select linear or cubic (gimp 1.3.9 here)
> if its true, then it would explain why it looks sharper then linear
> downscaling

That's probably the reason.

Matthias