Quote:
Originally Posted by MfA
BTW, I should add that as far as linear interpolators go this is all really old hat ...
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Maybe it's old hat. But I've just tried the 2nd "fresh" paper which you kindly explained to me. And I don't like the results much. Old hat Spline36 looks worlds better to me. For those interested, here is a photo upsampled 425% by various resampling filters:
http://madshi.net/prefiltering.rar (25MB)
- Bilinear.bmp
- Prefiltering + Bilinear.bmp
- Bicubic50.bmp
- Bicubic75.bmp
- Spline36.bmp
- Lanczos4 - madshi tweaked.bmp
The "Prefiltering + Bilinear" is what MfA's 2nd "fresh" paper produces. It's a lot less blurry compared to simple Bilinear resampling, but it has quite visible ringing and isn't any better in terms of aliasing compared to simple Bilinear filtering. Spline36 has a similar amount of ringing, but has *MUCH* reduced aliasing.
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Sooooo, back to Spline16/36/64/256?
