A novel algorithm for multispectral and panchromatic images based on the physical characteristics of the imaging systems is proposed.In the new algorithm,the à trous wavelet transform is used to extract the detail information of the panchromatic image,and after being adjusted with a certain injection model,the extracted information is injected into the original multispectral images.Multispectral images with high spatial resolution are obtained.Some physical characteristics of the imaging system,including th...