Frequency-based fusion of multiresolution images

This paper gives brief overviews on common image fusion methods in both spatial and spectral domains, and proposes a frequency-based image fusion approach for preserving the spatial and spectral information in merging multiresolution images. Procedures of these image fusion approaches and resulted images from merging QuickBird panchromatic and multispectral images are presented. In comparison with the other fusion methods tested, the suggested frequency-based fusion approach is flexible and suitable for enhancing the information content of the multiresolution images.