mirror of
https://git.FreeBSD.org/ports.git
synced 2025-01-05 06:27:37 +00:00
646a05f6f8
NFFT is a software library, written in C, for computing non-equispaced fast Fourier transforms and related variations. It implements the following transforms: 1. Non-equispaced fast Fourier transform (NFFT) - forward transform (NFFT), i.e. frequency to time/space domain - adjoint transform (adjoint NFFT), i.e. time/space to frequency domain 2. Generalisations - to arbitrary nodes in time and frequency domain (NNFFT) - to real-valued data, i.e. (co)sine transforms, (NFCT, NFST) - to the sphere S^2 (NFSFT) - to the rotation group (NFSOFT) - to the hyperbolic cross (NSFFT) 3. Generalised inverse transformations based on iterative methods, e.g. CGNR/CGNE PR: 223429 Submitted by: Michael Danilov <mike.d.ft402@gmail.com>
19 lines
721 B
Plaintext
19 lines
721 B
Plaintext
NFFT is a software library, written in C, for computing non-equispaced fast
|
|
Fourier transforms and related variations. It implements the following
|
|
transforms:
|
|
|
|
1. Non-equispaced fast Fourier transform (NFFT)
|
|
- forward transform (NFFT), i.e. frequency to time/space domain
|
|
- adjoint transform (adjoint NFFT), i.e. time/space to frequency domain
|
|
|
|
2. Generalisations
|
|
- to arbitrary nodes in time and frequency domain (NNFFT)
|
|
- to real-valued data, i.e. (co)sine transforms, (NFCT, NFST)
|
|
- to the sphere S^2 (NFSFT)
|
|
- to the rotation group (NFSOFT)
|
|
- to the hyperbolic cross (NSFFT)
|
|
3. Generalised inverse transformations based on iterative methods, e.g.
|
|
CGNR/CGNE
|
|
|
|
WWW: https://www-user.tu-chemnitz.de/~potts/nfft
|