iwt_dd.m

来自「function [beta,alfa] = AIDyadDown(afine,」· M 代码 · 共 46 行

function x = IWT_DD(wc,L,D,F,LEF,REF)
% IWT_DD -- Inverse transform Deslauriers-Dubuc wavelets
%  Usage
%    x = IWT_DD(wc,L,D)
%  Inputs
%    wc       1-d wavelet transform; length(w) = 2^J
%    L        coarsest resolution. L << J
%    D        degree of interpolating polynomials
%  Outputs
%    x        1-d signal reconstructed from w
%
%  Description
%    IWT_DD implements a 1-d inverse wavelet transform of data which
%    arise as the outputs of point sampling devices.  The ideas are
%    described in ``Interpolating Wavelet Transforms.''
%
%  See Also
%    FWT_DD, FWT_AI, FWT_PO 
%

        if nargin == 3,
	  F = MakeDDFilter(D);
	  [LEF,REF] = MakeDDBdryFilter(D);
	end
	  
        [n,J] = dyadlength(wc);
	w     = ShapeAsRow(wc);
	beta  = w(1:(2^L));
%
	for j=L:(J-1) ,
	   beta = DDDyadUp(beta,w(dyad(j)),D,F,LEF,REF);
	end
%
	x = ShapeLike(beta,wc);
    
    
    
%   
% Part of WaveLab Version 802
% Built Sunday, October 3, 1999 8:52:27 AM
% This is Copyrighted Material
% For Copying permissions see COPYING.m
% Comments? e-mail [e-mail]
%