perform_wavelet_transform.m

我找到的matlab的最新工具箱

function y = perform_wavelet_transform(x, Jmin, dir, options)

% perform_wavelet_transform - wrapper to wavelab Wavelet transform (1D/2D and orthogonal/biorthogonal).
%
%   y = perform_wavelet_transform(x, Jmin, dir, options);
%
%   'x' is either a 1D or a 2D array.
%   'Jmin' is the minimum scale (i.e. the coarse channel is of size 2^Jmin
%       in 1D).
%   'dir' is +1 for fwd transform and -1 for bwd.
%   'options.wavelet_vm' is the number of Vanishing moment (both for primal and dual).
%   'options.wavelet_type' can be
%       'daubechies', 'symmlet', 'battle', 'biorthogonal'.
%
%   'y' is an array of the same size as 'x'. This means that for the 2D
%   we are stuck to the wavelab coding style, i.e. the result
%   of each transform is an array organized using Mallat's ordering
%   (whereas Matlab official toolbox use a 1D ordering for the 2D transform).
%
%   Here the transform automaticaly select symmetric boundary condition
%   if you use a symmetric filter. If your filter is not symmetric
%   (e.g. Dauechies filters) then as the output must have same length
%   as the input, the boundary condition are automatically set to periodic.
%
%   You do not need Wavelab to use this function (the Wavelab .m file are
%   included in this script). However, for faster execution time, you
%   should install the mex file within the Wavelab distribution.
%       http://www-stat.stanford.edu/~wavelab/
%
%   Copyright (c) 2005 Gabriel Peyr