文件列表:

demofract.m (2340, 2000-07-31)
FFTfractsplinefilters.m (4242, 2000-07-31)
FFTwaveletanalysis.m (2307, 2000-07-31)
FFTwaveletsynthesis.m (2367, 2000-07-31)
fractsplineautocorr.m (1797, 2000-07-31)
wextract.m (1081, 2000-07-31)

FRACTIONAL SPLINE WAVELET SOFTWARE FOR MATLAB Thierry Blu and Michael Unser Biomedical Imaging group Swiss Federal Institute of Technology Lausanne (EPFL), Switzerland. October 1999 A. TEST PROGRAM DEMOFRACT: Demonstration program that generates fBm-like noise using orthogonal symmetrical fractional spline wavelets. For example, try J=12, alpha=0.3, beta=1.3. You can modify this file to use non-symmetrical fractional splines, or also semi-orthonormal fractional splines (modify the 'type' variable: type = '+ortho', or '-ortho', or '*ortho', or '+bspline', or '-bspline', or '*bspline', or '-dual', or '+dual', or '*dual') DEMOFRACT2: Generates a series of fBm-like noises. B. BASIC WAVELET TRANSFORM FUNCTIONS FFTFRACTSPLINEFILTERS: Computes the frequency responses of the wavelet analysis and synthesis filters (lowpass and highpass) for various types ('+ortho','-ortho','*ortho','+bspline','-bspline','*bspline','-dual','+dual','*dual') of orthonormal or semi-orthonormal fractional spline wavelet transforms. The type "*ortho" is a continuous-order generalization of the Battle-Lemari transform. FFTWAVELETANALYSIS: Performs a FFT-based computation of the wavelet transform of a signal to a given depth J. FFTWAVELETSYNTHESIS: Performs a FFT-based computation of the inverse wavelet transform. C. OTHER ROUTINES WEXTRACT: Extraction of a component (or band) of the wavelet transform. FRACTSPLINEAUTOCORR: Frequency domain computation of fractional spline autocorrelation function.

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