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Isn't the sync more for 1-dimensional things, like audio? I would expect images to need the Airy disk. https://en.wikipedia.org/wiki/Airy_disk https://en.wikip
by burfog 8y ago
Isn't the sync more for 1-dimensional things, like audio? I would expect images to need the Airy disk.
https://en.wikipedia.org/wiki/Airy_disk https://en.wikipedia.org/wiki/Airy_disk
- theoh 8y agoSinc is closely related to Bessel functions (which is what the Airy disc is). In image processing afaik it is interpreted as a radially-symmetric filter, if it's not just used as if it was separable (i.e. on the x axis, then on the y axis). I don't think it is exactly the same as the Airy disc, but it's a good question. http://mathworld.wolfram.com/SincFunction.html http://mathworld.wolfram.com/SincFunction.html
- jacobolus 8y agoThere isn’t really any perfect choice for images with a square lattice of sample points. With a one-dimensional signal you don’t get the same annoying patterns from the interaction of the two grids along different dimensions. If you use a equilateral triangle grid (if you like, think of hexagonal pixels) you can do better.