www.gusucode.com > wavelet 源码程序 matlab案例代码 > wavelet/FiltersforDoubleDensityWaveletTransformExample.m

    %% Filters for Double-Density Wavelet Transform  
% Obtain valid filters for the double-density wavelet transform.   

%% 
% Load the noisy Doppler signal. Obtain the filters for the double-density
% wavelet transform. The double-density wavelet transform uses the same
% filters at all stages. Demonstrate perfect reconstruction using the  
% double-density wavelet transform. 
df = dtfilters('filters1');
load noisdopp;
dt = dddtree('ddt',noisdopp,5,df,df);
xrec = idddtree(dt);
max(abs(noisdopp-xrec))