Fourier Transform Spectroscopy

SciCraft is an open source data analysis software developed in Python which allows you to access advanced mathematical functions through an easy-to-use graphical interface. Typical methods can be anything from areas like statistics, chemometrics and artificial intelligence and from languages like...

Sound You Can See ! Sound View is an Audio Spectrum Analyzer & Spectrograph App. It analyzes sound from the built in microphone, or from the Line in input device, and displays the results in three separate views. The waveform view displays the raw input signal as a continuous wavy line, where...

This is an old program (1.999) that I have written for understanding radiation patterns of antennas. Basically I was looking for the relationship between interference diagram (Fourier transform of ilumination, usually called Array Factor) and 3D radiation pattern of the Array. For that reason, it...


Platforms: Matlab

HARMASYLLABLESEG - Segments a signal stored in a WAV file into individual syllables. Also graphs the spectrogram and signal with syllables highlighted in red to show what parts of the signal contain syllables. INPUT: - FILENAME: The path to a signal stored in WAV format. The following arguments...


Platforms: Matlab

The Matlab code in this folder implements 1D-3D NUFFTs via fast Gaussian gridding. The convolution loops are written as C programs to be compiled as mex files from the Matlab command prompt. Further mathematical details about the code can be found in L. Greengard and J. Lee, "Accelerating the...


Platforms: Matlab

This framework facilitates short-time speech processing. A vector containing audio data samples is taken as input, the short-time Fourier transform (STFT) is then computed and the resulting complex spectrum is decomposed into magnitude and phase spectra. No modification is made in this 'hello...


Platforms: Matlab

Measures of Analysis of Time Series (MATS) toolkit computes a number of different measures of analysis of scalar time series (linear, nonlinear and other statistical measures). It also contains pre-processing tools (transformations and standardizations), data splitting facility, resampled data...


Platforms: Matlab

W = mywigner(Ex)W = output Wigner distributionEx = Input electric field (MUST be a column vectorNotes:W = Int(-inf..inf){E(x+y)E(x-y)exp[2ixy]}E(x+y) & E(x-y) are calculated via a FFT (fast Fourier transform) using theshift theorem. The integration is performed via a FFT. Thus it is important for...


Platforms: Matlab

This function generate the point-spread function for a widefield microscope using a scalar diffraction-limited model (Stokseth refer to [1] and [3] below)----------------Input parameters:lambdaEx: Excitation Wavelength (in nm)lambdaEm: Emission wavelegnth (in nm)numAper: Numerical aperture of the...


Platforms: Matlab

Computes mel frequency cepstral coefficient (MFCC) features from a given speech signal. The speech signal is first preemphasised using a first order FIR filter with preemphasis coefficient. The preemphasised speech signal is subjected to the short-time Fourier transform analysis with a specified...


Platforms: Matlab

There are three M-files:1. third.m, calculates the third-order moment for a time series2. aaft.m, calculates the Amplitude Adjusted Fourier Transform (for more details see: D. Kugiumtzis, Surrogate data test for nonlinearity including monotonic transformations, Phys Rev E, vol. 62, 1, 2000)3....


Platforms: Matlab

This package provides implementations of several spectral (FFT,DCT)saliency algorithms for images.There are several methods (multichannel_method) to calculate themultichannel saliency:'fft': by default the same as 'fft:whitening''fft:whitening' Uses spectral whitening to calculate the saliency of...


Platforms: Matlab

Computes the autocovariance of two columns vectors consistently with the var and cov functions.autocov computes the autocovariance between two column vectors X and Y with same length N using the Fast Fourier Transform algorithm from 0 to N-2.The resulting autocovariance column vector acv is given...


Platforms: Matlab

Recent studies on Mathematical modeling of visual cortical cells [Kulikowski/Marcelja/Bishop:1982] suggest a tuned band pass filter bank structure. These filters are found to have Gaussian transfer functions in the frequency domain. Thus, taking the Inverse Fourier Transform of this transfer...


Platforms: Matlab

TAL-Vocoder is a vintage vocoder emulation with 11 bands that emulates the sound of vocoders from the early 80???*a*?s. It includes analog modeled components in combination with digital algorithms such as the SFFT (Short-Time Fast Fourier Transform). This vocoder does not make a direct...


Platforms: Mac

The incoming signal is analysed via a FFT (Fast Fourier Transform), resulting in the familiar spectrum plot where the full audio spectrum is split into a number of narrow frequency bands. The outgoing audio is then regenerated by an Inverse FFT. The interesting bit is that the plug-in lets you...


Platforms: Mac

smib is a mosaic of FORTH and LISP, C Sauce and an experimental programming language close to mathematical language. In this version : law of large numbers, central limit theorem, hyperbolic trigonometry, warnings are cleaned . Features . Number theory : infinite size integers, arithmetic...


Platforms: *nix

In the present program three methods are used to solve a heat conduction problem. This problem is given in M. N. doOCozisik, Heat Conduction, Wiley, New York, 1980. We use pdepe, short times solution based on analytical inversion of a Laplace transform and finally a numerical solution based on...


Platforms: Matlab

These two functions impliment the system of elliptical Fourier shape descriptors first described by Kuhl and Giardina in "Elliptic Fourier features of a closed contour" Computer Graphics and Image Processing 18:236-258 1982. fEfourier is the forward transform which creates a "shape spectrum" of a...


Platforms: Matlab

This is a tidied up version of Adam Wilmer's Fourier-Mellin transform for simple image rotation, scale and translation. No GUI is included and some code is cribbed directly from his implementation. I'm totally new to Matlab, so please excuse any coding faux-pas I have committed here.


Platforms: Matlab