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rbiowavf

Reverse biorthogonal spline wavelet filters

Description

example

[RF,DF] = rbiowavf(wname) returns the reconstruction (synthesis) and decomposition (analysis) scaling filters, RF and DF, respectively, associated with the reverse biorthogonal wavelet specified by wname.

Examples

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Obtain the reverse biorthogonal reconstruction and decomposition scaling filters for the 'rbio3.1' wavelet. The 'rbio3.1' wavelet has three vanishing moments for the decomposition (analysis) wavelet and one 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 2.

[LoD,HiD,LoR,HiR] = wfilters('rbio3.1');
max(abs(sqrt(2)*DF-LoD))
ans = 0
max(abs(sqrt(2)*RF-LoR))
ans = 0

Input Arguments

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Name of reverse biorthogonal wavelet, specified as 'rbioNd.Nr' where possible values for Nd and Nr are as follows:

Nd = 1Nr = 1 , 3 or 5
Nd = 2Nr = 2 , 4 , 6 or 8
Nd = 3Nr = 1 , 3 , 5 , 7 or 9
Nd = 4Nr = 4
Nd = 5Nr = 5
Nd = 6Nr = 8

Nd and Nr are the numbers of vanishing moments for the decomposition and reconstruction filters, respectively.

Example: 'rbiowavf3.7'

Output Arguments

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Reconstruction filter associated with the reverse biorthogonal wavelet wname, returned as a real-valued vector.

Decomposition filter associated with the reverse biorthogonal wavelet wname, returned as a real-valued vector.

See Also

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Introduced before R2006a