Undefined function or variable 'FSfarras'
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i am using 2d dual tree discrete wavelet transform .it says error while compiling as [Faf, Fsf] = FSfarras; ??? Undefined function or variable 'FSfarras'.please help us
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Youssef Khmou
2013-2-2
add the function FSfarras in your MATLAB directory and try again :
function [af, sf] = FSfarras
% Farras filters organized for the dual-tree
% complex DWT.
%
% USAGE:
% [af, sf] = FSfarras
% OUTPUT:
% af{i}, i = 1,2 - analysis filters for tree i
% sf{i}, i = 1,2 - synthesis filters for tree i
% See farras, dualtree, dualfilt1.
%
% WAVELET SOFTWARE AT POLYTECHNIC UNIVERSITY, BROOKLYN, NY
% http://taco.poly.edu/WaveletSoftware/
af{1} = [
0 0
-0.08838834764832 -0.01122679215254
0.08838834764832 0.01122679215254
0.69587998903400 0.08838834764832
0.69587998903400 0.08838834764832
0.08838834764832 -0.69587998903400
-0.08838834764832 0.69587998903400
0.01122679215254 -0.08838834764832
0.01122679215254 -0.08838834764832
0 0
];
sf{1} = af{1}(end:-1:1, :);
af{2} = [
0.01122679215254 0
0.01122679215254 0
-0.08838834764832 -0.08838834764832
0.08838834764832 -0.08838834764832
0.69587998903400 0.69587998903400
0.69587998903400 -0.69587998903400
0.08838834764832 0.08838834764832
-0.08838834764832 0.08838834764832
0 0.01122679215254
0 -0.01122679215254
];
sf{2} = af{2}(end:-1:1, :);
3 个评论
Youssef Khmou
2013-2-2
编辑：Youssef Khmou
2013-2-2
if you use it in your project,please add the following link in the reference:
maha lakshmi
2013-2-2
Youssef Khmou
2013-2-2
编辑：Youssef Khmou
2013-2-2
function w = dualtree2D(x, J, Faf, af)
% 2D Dual-Tree Discrete Wavelet Transform
%
% w = dualtree2D(x, J, Faf, af)
% INPUT:
% x - 2-D signal
% J - number of stages
% Faf - first stage filters
% af - filters for remaining stages
% OUPUT:
% w{i}{1:J+1}: tree i wavelet coeffs (i = 1,2)
[x1 w{1}{1}] = afb2D(x, Faf{1});
for k = 2:J
[x1 w{k}{1}] = afb2D(x1, af{1});
end
w{J+1}{1} = x1;
[x2 w{1}{2}] = afb2D(x, Faf{2});
for k = 2:J
[x2 w{k}{2}] = afb2D(x2, af{2});
end
w{J+1}{2} = x2;
for k = 1:J
for m = 1:3
[w{k}{1}{m} w{k}{2}{m}] = pm(w{k}{1}{m},w{k}{2}{m});
end
end
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2013-2-2
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