Fourier Transforms

This program transforms the images and the sounds using single BIG Fourier Transforms (or DCT/DST,etc.). It produces very interesting and strange effects and allows you to transform sounds to images and vice-versa. To see what it does see the examples . Platforms: *nix

eFECTIV performs shape outline analysis based on Elliptical Fourier transforms. The software includes a graphical user interface and several options to assist the user during the analysis Platforms: Windows, Mac

GFFT is generic simple and efficient Fast Fourier Transforms (FFT) implementation using policy-driven design and template metaprogramming. This new implementation of Fast Fourier transforms rose during study of the classical Cooley-Tukey algorithm and from an idea to assume the transform length... Platforms: *nix

Numarray provides array manipulation and computational capabilities similar to those found in IDL, Matlab, or Octave. Using numarray, it is possible to write many efficient numerical data processing applications directly in Python without using any C, C++ or Fortran code (as well as doing such... Platforms: *nix

Modest Ordinary Differential Equation Library is a C++ library to model rate equations. MODEL is a numeric simulation library written during my PhD to simulate systems of rate equations describing Vertical Cavity Surface Emitting Lasers (VCSELs). I decided to write one myself after looking at... Platforms: *nix

The fundamental package needed for scientific computing with Python is called NumPy.  This package contains: - a powerful N-dimensional array object - sophisticated (broadcasting) functions - basic linear algebra functions - basic Fourier transforms - sophisticated random number capabilities... Platforms: Windows, Mac, *nix, Python, BSD Solaris

SciPy (pronounced "Sigh Pie") is open-source software for mathematics, science, and engineering. It is also the name of a very popular conference on scientific programming with Python. The SciPy library depends on NumPy, which provides convenient and fast N-dimensional array manipulation. The... Platforms: Windows

Parallel Colt is a multithreaded version of Colt - a library for high performance scientific computing in Java. It contains efficient algorithms for data analysis, linear algebra, multi-dimensional arrays, Fourier transforms, statistics and histogramming Platforms: Windows, Mac, Linux

Nonlinearity detection scheme based on zeroing the initial time response over various intervals and computing the FFT of each, as described in: M. S. Allen and R. L. Mayes, "Estimating the Degree of Nonlinearity in Transient Responses with Zeroed Early-Time Fast Fourier Transforms," in... Platforms: Matlab

This e-book is based on the Student Edition of MATLAB 7, which includes a symbolic toolbox. The Professional Edition may of course also be used. The goal is to exploit a restricted subset of MATLAB commands and functions to explore most of the elements of undergraduate mathematics. All items from... Platforms: Matlab

Libgdx is a Java framework that provides a cross-platform API for game and real-time application development. It offers the following features: General * Cross-platform development for Windows, Linux, OSX and Android.(32- and 64-bit where available) * Multiple backends based on Jogl, LWJGL,... Platforms: Mac

Fourier Transform Lab Student Edition is an advanced application designed for performing Fourier transformations, which can be useful in teaching Crystallography, since they are related to Optical Transforms (e.g. laser diffraction patterns). Furthermore one may get a quick hands-on experience... Platforms: Windows

The inversion of Laplace transforms is performed using two methods: (1) the Zakian method and (2) the Fourier series approximation. Results are in agreement with analytical solutions. The Zakian method presents problems for transcendental functions. The Fourier series gives better results when... Platforms: Matlab

It tries to approximate a f(x) function with a m term Fourier series, using the quad MATLaB function. Requirements: - MATLAB 7.1.0 or higher Platforms: Windows, Mac, *nix, Matlab, BSD Solaris

Finding the Fourier transform of a rectangular pulse..filtering the spectrum and regenerating the signal usingthe filtered spectrum is done...at the end Rayleigh theorem is proved by showing that the energy content of both time domain and frequency domain signals are equal..your comments are... Platforms: Matlab

According to shannon theory it is possible to reconstruct a band limited signal from its Fourier components provided it is sampled sufficiently...just to demonstrate this, posting a small example based on that Platforms: Matlab

These are two M-files d-deDUfourier1d-deDt and d-deDUfourier2d-deDt The first is designed to demonstrate how triangular, rectangular, saw tooth, half wave and full wave rectified signals can be built from superposition of a predefined no of Fourier harmonic terms. It demonstrates how increasing... Platforms: Matlab

The Fourier Calculator (Simulink model) can be used for arbitrary signals. In this case the Wolfer sun spot data are analyzed Platforms: Matlab

With this Fourier Calculator a periodic signal can be analyzed and represented in figures with harmonics.The signals can easily be produced in the model. Platforms: Matlab

This program is open source code of fast Fourier transform in matlab.Where y is the input argument and p is the normalized size of the input. Lety = [1 2 3 4 ];x= length(y);m= log2(x);p= ceil(m);To call the function useft2(y,p); Platforms: Matlab