![]() We'll use this "filter" vector for the rest of this section. This vector encodes all there is to know about the chosen wavelet: Wavelet transform is very efficient and in fact even faster than the fast Fourier transform.įirst, we make a short constant vector, called a filter, which is used much like a stencil in finite differences to compute the wavelet transforms. ![]() The value of the transform are the coefficients of the expansion, just like in discrete Fourier transform. Wavelet transform is the expansion of a vector in a basis of wavelets. Wavelet transform (discrete, orthogonal, periodicized) Edit your startup.m file (mine is /Users/jmandel/Matlab/startup.m) and add the Wavelab directory to your path:.WAVELABPATH='/Users/jmandel/Matlab/Wavelab850/' edit the file WavePath.m and add the line to set WAVELABPATH just before while (exist(WAVELABPATH)~=7) (note the / at the end):.3.2 Get some wavelet pictures and the wavelet matrix. ![]()
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