B. Wavelet Analysis for Gait Feature Extraction
Unlike the Fourier transform technique, wavelet transform
can use wavelet basis function with good localization in both
frequency and time for decomposing an arbitrary function, and
the wavelet coefficient obtained can carry the information
about both frequency and time in original data[5-8]. The
wavelet basis function is obtained by dilations and translation
of the mother waveletψ ( )t :