Time–frequency analysis

Short time fourier transform (stft) in matlab

The following Matlab project contains the source code and Matlab examples used for short time fourier transform (stft). %% function [t,frequency,Power_spectrum]=fft_s(y,windowlength) %% Inputs : % y: input raw signal % windowlength: window length to take fast fourier transform, it is a % factor of smapling frequency for example one can enter a window length % half of the sampling frequency by enteríng 0.

Image compression in matlab

The following Matlab project contains the source code and Matlab examples used for image compression.  OBJECTIVE   To implement curvelet transform for the compression of images and to achieve higher compression ratio than the other existing compression algorithms like JPEG2000,SPIHT   WAVELET based algorithms can only reproduce points and straight lines   Theoretically curvelets can store curved edges using fewer coefficients.

Relative wavelet energy in matlab

The following Matlab project contains the source code and Matlab examples used for relative wavelet energy. a program calculates Relative wavelet energy with brief tutorial  Reference: O.A. Rosso, M.T. Martin b, A. FigliolaEEG “analysis using wavelet-based information” Journal of Neuroscience Methods 153 (2006) 163–182

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