Create image_fusion_using_wavelet_transform.m

Well this is not a machine learning algorithm,but since I uploaded a PCA based image fusion I thought I'll upload another image fusion algorithm.
This is one of the projects I did a while ago for IIRS(Indian Institute of Remote Sensing).
This code is a MATLAB based GUI for image fusion.
This algorithm fuses 2 images -one panchromatic and one multi-spectral.
Since a panchromatic image has high spatial resolution and a multi-spectral image has the spectral(coloured) content,Image fusion tries to combine both of these properties into a single image.This image fusion algorithm uses wavelets decomposition.