Open Directory - Science: Math: Numerical Analysis: Software: Fast Fourier Transforms

See also:

FFTW - Fast free C FFT library; includes multi-dimensional, real-complex, and parallel transforms.
Joerg's FXT Page - Source code and links for many different FFT implementations and related information.
Row-oriented Multidimensional Fast Transform Library (RMFTL) - Power-of-two real and complex FFT software that is faster, and more accurate, than conventional iterative implementation of one-dimensional FFTs. Based on a proprietary algorithm.
Sigview - FFT Analysis Software - A real-time spectral analysis application with spectral analysis tools, statistical functions and visualization system. It can analyse data from WAV files or sound input from microphone or CD player. Shareware.
fftpack - A package of Fortran subprograms for the fast Fourier transform of periodic and other symmetric sequences.

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Open Directory - Science: Math: Analysis: Transform Calculus

An Introduction to Fourier Theory - A mathematically inclined introduction with illustrations and explanations of related theorems, its properties and numerical methods for calculating transforms.
Fast Fourier Transform - Article in MathWorld.
Fast Fourier Transforms - Survey and history of FFT algorithms from Wikipedia.
Introduction to the Fourier Transform - Notes on applications to Image Processing.
Mathematics of the Discrete Fourier Transform (DFT) - Notes by Julius O. Smith III, Stanford.

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Last update: Sunday, November 9, 2008 7:54:05 AM EST - edit