Wiki Wavelab

[Ken Simpson]

Hi - I've install Wavelab under Octave 2.1.70

        http://wiki.octave.org/wiki.pl?WavelabOnOctave

and ran the following example (lifted from the above URL and modified 
slightly)

        octave:2> img = imread('/home/ken/images/lena256.jpg');
        octave:3> qmf = MakeONFilter('Symmlet',8); 
        octave:4> [n,J] = dyadlength(img); 
        octave:5> wc = FWT2_PO(img,J-1,qmf); 
        octave:5> imshow(wc) 

using the recommended fix for the reverse.m problem by P.Kienzle, 
namely, 

        dispatch("reverse","Wavelab_reverse","matrix");

It appeared to worked in the sense the forward transformation generated 
the image I expecetd, however, when I attempted the inverse transformation 

        octave:6> img = IWT2_PO(wc,J-1,qmf);
        octave:7> imshow(img) 

it appears to be executing the forward wavelet transform on img instead 
of the inverse.

Has anyone else used this package? 

Am I doing the inverse transformation correctly? 

Does the fix (an alternate solution to the reverse.m problem) by L. Jacques 
work?

Is this the right mailing list to be asking Wiki related questions? 

Any help would be greatly appreciated. 

-- Ken



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