3 ms·
The multiplication is concisely described here http://numbers.computation.free.fr/Constants/Algorithms/fft.html http://numbers.computation.free.fr/Constants/Alg
by yread 8y ago
The multiplication is concisely described here
http://numbers.computation.free.fr/Constants/Algorithms/fft.html http://numbers.computation.free.fr/Constants/Algorithms/fft....
For 2D -> 3D, see
https://en.wikipedia.org/wiki/Projection-slice_theorem https://en.wikipedia.org/wiki/Projection-slice_theorem
for a simple overview