nonuniform discrete Fourier transform of type II about torchkbnufft HOT 4 CLOSED

Hello @kylematoba, in our case we define a forward NUFFT as a linear operator that applies an FFT followed by a linear interpolation with a Kaiser-Bessel function. Since it is a linear operator, the adjoint is defined as the adjoint of these individual operations in reverse order.

I think what you are describing would be some sort of Non-uniform inverse fast Fourier Transform (NUIFFT) operator, which would have its own distinct adjoint separate from any implemented in this package.

from torchkbnufft.

So, do I understand correctly that there is no way to use your package to perform a Fourier transform with data that is nonuniform in space to modes that are uniform in frequency?

from torchkbnufft.

@apt-get-nat using the duality property you may be able to approximate this operation using the package.

from torchkbnufft.

Closing as this does not document a bug.

from torchkbnufft.