Wavelet packet coefficients thresholding
NT = wpthcoef(T,KEEPAPP,SORH,THR)
wpthcoef is a one- or
two-dimensional de-noising and compression utility.
NT = wpthcoef( returns
a new wavelet packet tree T,KEEPAPP,SORH,THR)NT obtained from the
wavelet packet tree T by coefficients thresholding.
If KEEPAPP = 1, approximation coefficients
are not thresholded; otherwise, they can be thresholded.
If SORH = 's', soft thresholding
is applied; if SORH = 'h', hard thresholding is
applied (see wthresh for more
information).
THR is the threshold value.