Thanks for the comparisons! More are always helpful when done well.
Quote:
Originally Posted by FranceBB
As to Lanczos, well, it's been one of my favorite resizing kernel as it offers a pretty sharp upscale and downscale but with less artifacts than Bicubic, in my opinion.
As to the Spline resize based kernels, well, they offer a pretty good sharp result whenever you are upscaling, but they can't generally be used to downscale as the result would be too oversharped.
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Lanczos is also a spline based resize kernel, Lanczos3 and Spline36 are very similar, with Spline36 sharpening very slightly
less than Lanczos3. Lanczos4 is slightly sharper than Spline64 too. It seems weird to compare 3 tap Lanczos to 4 tap spline when you could use 3 tap spline and/or 4 tap Lanczos, they also have the same computational requirements at the same number of taps. Due to this your distinction between them seems backwards (though I do not think they are very different either).