3 ms·
Lanczos if you want sharpness above all else. There's also the well-known Mitchell-Netravali filters[1], based on piece-wise cubic splines and with two tunable
by magicalhippo 2y ago
Lanczos if you want sharpness above all else. There's also the well-known Mitchell-Netravali filters[1], based on piece-wise cubic splines and with two tunable paramerers.
[1]: https://en.wikipedia.org/wiki/Mitchell%E2%80%93Netravali_filters https://en.wikipedia.org/wiki/Mitchell%E2%80%93Netravali_fil...
- Dwedit 2y agoWhenever I want to upscale, I use an Edge-Directed algorithm, such as SuperXBR. Diagonal lines stay diagonal and don't turn into blurry boxes.
- jorvi 2y agoI don't know the fine details of it but afaik FSR <3.0 is Lanczos with a few tricks to both speed it up and make the visuals more stable.
- mark-r 2y agoThere's a pair of parameters that make Mitchell-Netravali nearly identical to Lanczos-3, but my grep-fu is failing me at the moment. I'll try to find it later.
- mark-r 2y agoFound it. The parameters are B=0 C=0.5458 in the Mitchell-Netravali formula to emulate Lanczos-3. It's not a perfect match, but I dare you to see the difference.
- magicalhippo 2y agoCool, will check it out.