Wavelet-based multispectral image fusion

We use our proposed integer wavelet transform and principal component analysis (PCA) to fuse low-resolution Landsat TM multispectral images and a SPOT panchromatic (PAN) image to generate spectrum-preserving high-resolution multispectral images; moreover, the fused multispectral images are simultaneously obtained via only one wavelet transform. Several other methods were implemented to compare with the proposed approach; based on the correlation criterion, the proposed approach was shown to be superior to the other methods