perform_pyramid_transform_do.m

小波提升算法的实现

function y = perform_pyramid_transform_do(x, pfilt, k)

% perform_pyramid_transform_do - call the pyramidal transform of Do & Vetterli
%
%   y = perform_pyramid_transform_do(x, pfilt, k);
%
%   pfilt is the type of filter, can be '9-7', '5-3', 'Burt'
%
%   Use the algorihtm of 
%       Laplacian Pyramid Toolbox (version 1.0, June 2004)
%       http://www.ifp.uiuc.edu/~minhdo/software/
%   For more information see 
%       M. N. Do and M. Vetterli, Framing pyramids, 
%       IEEE Transactions on Signal Processing, 
%       vol. 51, pp. 2329-2342, Sep. 2003
%
%   Copyright (c) 2005 Gabriel Peyr