Abstract: A Multispectral and High-resolution Panchromatic image fusion algorithm based on the DT-CWT transform and fractal dimension is developed. Firstly, the panchromatic images and the component I of the multi-spectral image are decomposed to the domain of the DT-CWT transform which has the advantage of good directions, and the image fusion is then implemented in different subbands. The region energy fusion algorithm is adopted as fusion rules in low-pass subbands and high-pass subbands, and images are merged with different fractal dimension as weight. Finally, the stretched grayscale fused image replaces the original intensity component, and the final fused image is achieved. Compared to the traditional HIS transform and wavelet based algorithm, the warp of the proposed algorithm is only 30.31％ and 50.66％ the formers, respectively.

Key words: image fusion, dual-tree complex wavelet transform, fractal dimension