What is the difference between kernels for resampling?
Here we show two common kernels. Note that the tent function has kinks in it, whereas the sinc function in smooth.
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| Tent Function | Lanczos-Windowed Sinc Function |
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The kinks result in stellation Mach bands when interpolating.
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| Tent Function | Lanczos-Windowed Sinc Function |
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When decimating, the tent function is not that good at supressing aliasing, whereas the Lanczos-windowed sinc fiunction attenuates super-Nyquist detail to gray.
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| Tent Function | Lanczos-Windowed Sinc Function |
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