Confusing panchromatic image and multispectral image can obtained clearer image the maltispectral image alone. A multiresolution image fusion algorithm based on watershed segmentation and wavelet transform is proposed. Firstly

we obtain the wavelet pyramid using the orthogonal wavelet transform. Then

watershed segmentation of the approximation image is computed

and the inverse wavelet transform is used to project this original segmentation up to the higher resolutions. After joint region analyzed

the joint region segmentation map is obtained

which is further used to guide the fusion of the wavelet coefficients. Finally

the inverse transform of the fused coefficients is implemented in order to obtain the final fusion image. The experimental results indicate that the algorithm is effective for the remote sensing image fusion

which can give consideration well to the spectral quality and spatial definition.