You already have the wavelet toolbox in Matlab:

http://fr.mathworks.com/help/wavelet/examples/wavelet-analysis-for-3d-data.html#zmw57dd0e860

Hello Maha, you have an example in mathworks of how to apply wavelet to 3D Image.

http://fr.mathworks.com/help/wavelet/examples/wavelet-analysis-for-3d-data.html

And in the following link you have another example:

http://eeweb.poly.edu/iselesni/WaveletSoftware/standard3D.html

I  hope it helps.

Regards.

thanks but the 3D mesh that I have is a 3D mesh (vertices(array(5197*3)) and faces(array(10390*3))) as the bunny mesh

thanks but the 3D mesh that I work on is different from the MRI(128*128*27)

my 3D mesh (vertices(array(5197*3)) and faces(array(10390*3))) as the bunny mesh

Toolbox Wavelets on Meshes - A Toolbox for Multiscale Processing of Triangulated Meshes

Copyright (c) 2008 Gabriel Peyre

Contents

Curve Subdivision

Triangulated Mesh Subdivision

Wavelet Transform of Functions Defined on Surfaces

Wavelet Transform of a Surface

The toolbox can be downloaded from Matlab Central http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=17577&objectType=FILE