| Wavelet Toolbox | |
Biorthogonal spline wavelet filters.
Syntax
[RF,DF] = biorwavf(W)
Description
[RF,DF] = biorwavf(W) returns two scaling filters associated with the biorthogonal wavelet specified by the string W.
W = 'biorNr.Nd' where possible values for Nr and Nd are:
Nr = 1 |
Nd = 1 , 3 or 5 |
Nr = 2 |
Nd = 2 , 4 , 6 or 8 |
Nr = 3 |
Nd = 1 , 3 , 5 , 7 or 9 |
Nr = 4 |
Nd = 4 |
Nr = 5 |
Nd = 5 |
Nr = 6 |
Nd = 8 |
The output arguments are filters.
RF is the reconstruction filter.DF is the decomposition filter.Examples
% Set spline biorthogonal wavelet name.
wname = 'bior2.2';
% Compute the two corresponding scaling filters.
% rf is the reconstruction scaling filter.
% df is the decomposition scaling filter.
[rf,rd] = biorwavf(wname)
rf =
0.2500 0.5000 0.2500
df =
-0.1250 0.2500 0.7500 0.2500 -0.1250
| | biorfilt | centfrq | |