A new image fusion algorithm based on wavelet transform

A new method is presented based on wavelet transform (WT) for the fusion of a high-resolution panchromatic image and a low-resolution multi-spectral image. The high-resolution panchromatic image approximation can be first merged into the multi-spectral image approximation by edge intensity factor, and then the merged image is reconstructed by means of an inverse WT using the fused approximation and the details from the high-resolution panchromatic image. A comparison of the proposed method with old wavelet merging method shows that the proposed method can achieve better performance in combining and preserving spectral-spatial information for the test images.