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GSP_DESIGN_MEYER - Design the meyer filterbank

Usage

g =  gsp_design_meyer(G, Nf, param);
gsp_design_meyer(G ,Nf);
gsp_design_meyer(G);

Input parameters

G Graph or upper bound on the Laplacian spectrum
Nf Number of filters to cover the interval [0,lmax] (default 6)
param Structure of optional parameters

Output parameters

g A cell array of filters

Description

This function return a array of filters designed to be meyer wavelet.

param is an optional structure containing the following fields

  • param.t: vector of scale to be used (default: log scale)
  • param.verbose: verbosity level. 0 no log - 1 display warnings. (default 1)

This function will compute the maximum eigenvalue of the laplacian. To be more efficient, you can precompute it using:

G = gsp_estimate_lmax(G);

Example:

Nf = 4;
G = gsp_sensor(100);
G = gsp_estimate_lmax(G);
g = gsp_design_meyer(G, Nf);
gsp_plot_filter(G,g);
gsp_design_meyer_1_1.png

This function is inspired by the sgwt_toolbox.