Fourier analysis

Linear convolution in matlab

The following Matlab project contains the source code and Matlab examples used for linear convolution. wen we give the two sequence ,we will get the o/p of linear convolution.the two sequences are computing by particular formula.thus we will got the output from the two sequences. the impulse response also we will get.

Directional discrete cosine transform and principal component analysis based image fusion in matlab

The following Matlab project contains the source code and Matlab examples used for directional discrete cosine transform and principal component analysis based image fusion. Image fusion algorithm based on DDCT and PCA is demonstrated. The reference is: VPS Naidu, "Hybrid DDCT-PCA base multi sensor image fusion”, Journal of Optics, Vol. 43, No.1, pp.48-61, March 2014.

Computes the autocovariance of two columns vectors consistently with the var and cov functions. in matlab

The following Matlab project contains the source code and Matlab examples used for 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.

Dft Matlab Code

discrete Fourier transform (DFT) converts a finite list of equally spaced samples of a function into the list of coefficients of a finite combination of complex sinusoids, ordered by their frequencies, that has those same sample values. 

Overlap add overlap save methods implementation for block dft processing. in matlab

The following Matlab project contains the source code and Matlab examples used for overlap add overlap save methods implementation for block dft processing.. The overlap add and overlap save are the two generally implemented methods when the input is greater than the maximum processible block in MATLAB because of memory constraints.

Compute n x n dft matrix in matlab

The following Matlab project contains the source code and Matlab examples used for compute n x n dft matrix. % dftmat = DFT matrix of order N x N; % N = Order of the matrix % computes the DFT matrix of orer N x N; % DFT matrix is a n x n matrix defined as Wn=[(Wn)^km] % Wn=exp(-j*2*pi/n) %Reference: Multirate Systems and Filter banks by P.

Dft & dct in matlab

The following Matlab project contains the source code and Matlab examples used for dft & dct. Code provided here works for 1-D signal. If you want to process it for 2-D signal (ex. GrayScale Image) first process the signal row wise and after that column wise.

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