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Code 1-15 of 15   

matlab code using daubechies wavelet for wavelet transform

Nowadays there are heaps of articles on the theory of fuzzy entropy and fuzzy mutual information. However, there is a clear significant lack for a Matlab implementation of these concepts. Based on numerous requests from students and researchers, I...

alculate the normalized partial energy sequence (NPES) for a given signal vector X.

If a particular transform is capable of capturing the key features of a signal in few coefficients, the NPES will approach unity for relatively...

Wavelet based square image enlargemant (zooming in).
Zooming is performed by employing the idwt2() MATLAB function, with a wavelet
family determined by 'wname'.
The size and quality of the final zoomed image 'output_image' depends on

This function plots the result of wavedec2 matlab function in two different modes. The first one called 'tree' displays all approximations and details coefficients (horizontal, vertical, diagonal), the second one called 'square' displays the...

The library includes compiled FIR filters, redundant and non redundant wavelet transform with dynamically sized channels, with applications to denoising and differentiation.

A collection of functions is presented
which includes 2nd generation wavelet
decomposition and reconstruction tools
for images as well as functions for the
computation of moment invariants.
The wavelet schemes rely on the...

This demo works on only the Approximate region of the Wavelet Transform

This function searches the interior of a signal in an attempt to find a segment that may be used in order to make the signal quasi-periodic. This can be used to reduce the influence of end effects on analyses such as the Hilbert Transform, the...

Image compression using wavelet transform

*wavelet transform give better information about non-stationary signals in time domain

These functions implement the 3D SPIHT algorithm, used for the compression of 3d wavelet coefficients. Such 3d wavelet coefficients are produced during the coding of video sequences.

This is a demo program of the paper J. Tian and L. Chen, "Image despeckling using a non-parametric statistical model of wavelet coefficients," Biomedical Signal Processing and Control, Vol. 6, No. 4, Oct. 2011, pp. 432-437.

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...

This toolbox is a fully object-oriented toolbox with a GUI for Bayesian Wavelet Networks. It is easy to use.
The training method is used here is one of powerfull, off-line training algorithm, called Hybrid Markov Chain Monte Carlo- based...

This transformation is non-redundant, approximately shift-invariant and produces oriented filters in 2D and 3D. There is a m-file called 'example.m' which shows how one can use this package.
For more information see the following paper: