Framelet-based Multiresolution Image Fusion with an Improved Intensity-hue-saturation Transform

The fusion of the panchromatic (PAN) image with multispectral (MS) images is a very useful tool for remote sensing applications that require both high-spatial and high-spectral resolution. A hybrid fusion method, which comprises of the standard intensity-huesaturation (IHS) transform and a wavelet transform, was recently introduced in the literature. The hybrid fusion method was able to eliminate drawbacks of the IHS and wavelet-based methods, while keeping the advantages. In this paper, we introduce a new hybrid fusion method based on the fast IHS transform with a control parameter along with the framelet transform. The control parameter is used to minimize the radiance difference between the PAN image and the intensity image. In addition, the framelet transform, which is a natural generalization of orthonormal wavelets if redundancy is introduced into the wavelet system, is used to extract the detailed spatial information from the difference image of the PAN image and the intensity image. In order to verify the performance of the proposed method, an IKONOS PAN image with MS images were used. The proposed method produces more satisfactory results, both visually and quantitatively. * Corresponding author.