Discrete Fourier Transform Dft
Y = DCTN(X) returns the discrete cosine transform (DCT) of X.X = IDCTN(Y) returns the inverse discrete cosine transform (IDCT) of Y.Y = DSTN(X) returns the discrete sine transform (DST) of X.X = IDSTN(Y) returns the inverse discrete sine transform (IDST) of Y.X and Y can be N-dimensional.D =...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (44): Screenshot Impulse response invariant discretization of distributed order low-pass filter Download |
These algorithms are an implementation of the iterative amplitude adapted Fourier Transform method of Schreiber and Schmitz to make surrogate time series. These surrogate time series or fields were made to have the Power spectrum and the amplitude distribution (or PDF) from a measurement, but...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 133.12 KB | Download (46): Surrogate time series and fields Download |
The function is much faster than Matlab's native (dct, idct, dct2, idct2). It also allows N-D (multidimensional) input.Example:x=randn(100,200,300);y=mirt_dctn(x); % forward DCTx=mirt_idctn(y); % inverse DCTFind more at my home page:http://www.bme.ogi.edu/~myronEnjoy and comment below if you like...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (46): Multidimensional Discrete Cosine Transform (DCT) Download |
Y = RESIZE(X,NEWSIZE) resizes input array X using a DCT (discrete cosine transform) method. X can be any array of any size. Output Y is of size NEWSIZE.Input and output formats: Y has the same class as X.As an example, if you want to multiply the size of an RGB image by a factor N, use the...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (43): Resize any arrays and images Download |
Katmus Katmus is an application for manual music transcription. It is based on QT4 and runs under GNU/Linux. Katmus features a score editor synchronized with a wave file, time stretching, audio analysis through the fast Fourier transform (FFT), play scores, export scores to lilypond, pdf, midi...,
Platforms: *nix
License: Freeware | Size: 491.52 KB | Download (41): Katmus Download |
Scorched 3D project is a game based loosely (or actually quite heavily now) on the classic DOS game Scorched Earth "The Mother Of All Games". Scorched 3D adds amongst other new features a 3D island environment and LAN and internet play. Scorched 3D is totally free and is available for both...
Platforms: *nix
License: Freeware | Size: 55 MB | Download (91): Scorched3D 41 Download |
FREE DiceLock Security DiceCheck-x GUI and DiceChecker.so Library.
If in your process or software applications you have need for random number streams and you want to check that the input or output random stream is really at random, you can incorporate DiceChecker-x.so library in your...
Platforms: *nix
License: Demo | Cost: $0.00 USD | Size: 1.01 MB | Download (173): DiceCheck-x Download |
NIST benchmark for librandomtest.so checking. Includes source and object code. Eclipse and gcc parameters included. Implemets the following tests: Approximate Entropy, Block Frequency, Cumulative Sums, Discrete Fourier Transform, Linear Complexity, Longest Run Of Ones, Rank, Overlapping Template...
Platforms: Linux
License: Freeware | Size: 1.05 MB | Download (50): NIST-librandomtests Download |
Random tests shared library in C. Includes source code and object code. Eclipse and gcc parameters included. Implemets the following tests: Approximate Entropy, Block Frequency, Cumulative Sums, Discrete Fourier Transform, Linear Complexity, Longest Run Of Ones, Rank, Overlapping Template...
Platforms: Linux
License: Freeware | Size: 236 KB | Download (51): librandomtests.so Download |
Solves the difficulty of computing and visualizing the DFT of an array that can be caused by (a) the units of frequency, (b) the mirroring effect, (c) the complex nature.% Inputs: -t, a time array evenly spaced 0:tstep:T% -x, the function array% -pl, {0,1} to display plot% Outputs: - f a...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (49): DFT easy computation and display Download |
This applet incorporates some image processing techniques in the Fourier optics domain. You can compute and see the Fourier transform of an object and the convolution between two images. You can also simulate the Vander Lugt correlator (matched filter, phase-only filter and inverse filter) and...
Platforms: Mac
License: Freeware | Size: 10.24 KB | Download (44): Fourier Optics Download |
This article consists of a brief discussion of the energy density over time or frequency that is obtained with the wavelet transform. Also an efficient algorithm is suggested to calculate the continuous transform with the Morlet wavelet. The energy values of the Wavelet transform are compared...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (48): Continuous Morlet Wavelet Transform Download |
Toolbox for MMSE estimators of DFT coefficients under the generalized Gamma densityThe toolbox can also be downloaded from: http://ict.ewi.tudelft.nl/~richard/The matlab files enclosed in this toolbox can be used to tabulate gain functionsfor clean speech complex-DFT, magnitude-DFT and magnitude...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (40): Toolbox for MMSE estimators of DFT coefficients under the generalized Gamma density Download |
[cg, psg] = crandn(rgau,m)Generate correlated Gaussian sequences by Fourier synthesis.Input parameters:rgau = correlation function - length n/2m = number of realisationsOutput:cg = m x n matrix containing m sequences of n correlated variates from a zero mean, unit variance normal distributionpsg...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (39): crandn Download |
The numerical inversion of the Laplace transform is a long standing problem due its implicit ill-posedness. These functions implement one of the more well known numerical inversion algorithms, the Weeks method. Particularly new here is the use of graphics processing unit [GPU] computing to...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 512 KB | Download (51): Weeks' Method for Numerical Laplace transform inversion with GPU acceleration Download |
Subspace learning based face recognition methods have attracted many researchersd-deOao interests in recent years. In thispaper, a novel Laplacian Smoothing Transform (LST) is proposed to transform an image into a sequence, by which low frequencyfeatures of an image can be easily extracted for a...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 3.65 MB | Download (40): Laplacian Smoothing Transform (LST) for Face Recognition Download |
GFourier can help you use Fourier Analysis for image restoration. GFourier calculates the Fourier Transform of a given image and allows the use of filters in the frequency domain. The Inverse Fourier Transform is then used to substitute original image.. Get GFourier at SourceForge.net. Fast,...
Platforms: *nix
License: Freeware | Size: 65.54 KB | Download (228): GFourier Download |
Generation of signal with extra parametersDetection using;Fast Fourier Transform AlgorithmGoertzel AlgorithmDigital Filtering (FIR Filter bank)
Platforms: Matlab
License: Freeware | Size: 61.44 KB | Download (57): DTMF Encoder/Decoder (Generation/Detection) Download |
Takes a vector containing audio data samples as an input, computes short-time Fourier transform (STFT) and plots the STFT power spectrum trajectories across time.http://www.downloadplex.com/index.php?a=admin&b=programs&os=Scripts&add
Platforms: Matlab
License: Freeware | Size: 2.87 MB | Download (38): Speech Spectrogram Download |
Simple implementation of [1] with small modification. Hopefully this is going to help beginners in speech/audio signal processing.[1] X. Zhu, G. T. Beauregard and L. L. Wyse, "Real-Time Signal Estimation From Modified Short-Time Fourier Transform Magnitude Spectra", IEEE Trans. on Audio, Speech,...
Platforms: Matlab
License: Freeware | Size: 40.96 KB | Download (43): Time-scale/pitch modification Download |