Adaptive remote sensing image panchromatic sharpening method

The invention discloses an adaptive remote sensing image panchromatic sharpening method, and belongs to the technical field of remote sensing image fusion. The spectral distortion of fusion results is reduced, and the sharpening effect of fusion results is improved. The method comprises the following steps: performing interpolation amplification on a low-resolution multispectral image to make the multispectral image and a corresponding panchromatic image have the same resolution; filtering the panchromatic image and the multispectral image of the same resolution to obtain low-frequency components; performing difference operation on the panchromatic image and the multispectral image of the same resolution and the low-frequency components to obtain corresponding high-frequency components; estimating missing initial detail images of the multispectral image on the basis of the high-frequency components of the two images; building an optimization function for the initial detail images, and optimizing the initial detail images in a rapid descent method to obtain final detail images suitable for different channels of the multispectral image; and injecting the final detail images into the corresponding channels of the multispectral image to obtain a high-resolution multispectral image. The adaptive remote sensing image panchromatic sharpening method of the invention is used for remote sensing image panchromatic sharpening.