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biorwavf

Biorthogonal spline wavelet filter

Syntax

[RF,DF] = biorwavf(W)

Description

[RF,DF] = biorwavf(W) returns the reconstruction (synthesis) and decomposition (analysis) 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 = 3Nd = 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

See Also

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