Reverse biorthogonal spline wavelet filters
[RF,DF] = rbiowavf(W)
[RF,DF] = rbiowavf(W) returns the two scaling filters associated with the biorthogonal wavelet specified by the string W.
W = 'rbioNd.Nr' where possible values for Nd and Nr are
|Nd = 1||Nr = 1 , 3 or 5|
|Nd = 2||Nr = 2 , 4 , 6 or 8|
|Nd = 3||Nr = 1 , 3 , 5 , 7 or 9|
|Nd = 4||Nr = 4|
|Nd = 5||Nr = 5|
|Nd = 6||Nr = 8|
The output arguments are filters.
RF is the reconstruction filter.
DF is the decomposition filter.
Obtain the reverse biorthogonal reconstruction and decomposition scaling filters for the 'rbio3.1' wavelet. The 'rbio3.1' wavelet has 3 vanishing moments for the decomposition (analysis) wavelet and 1 vanishing moment for the reconstruction (synthesis) wavelet.
[RF,DF] = rbiowavf('rbio3.1');
The reconstruction scaling filter, RF, and the decomposition filter, DF, are equal to the filters returned by wfilters scaled by .
[LoD,HiD,LoR,HiR] = wfilters('rbio3.1'); max(abs(sqrt(2)*DF-LoD)) max(abs(sqrt(2)*RF-LoR))
ans = 0 ans = 0