Spatial registration and local and global multi-scale multi-modal medical image fusion method

The invention belongs to the field of medical image fusion, and particularly relates to a spatial registration and local and global multi-scale multi-modal medical image fusion method. The method mainly utilizes a spatial registration network to perform registration processing on an image, eliminates the influence of image distribution difference on a registration result at the same time, then uses a multi-scale subtraction CNN branch and an MPViT branch to perform local and global multi-scale feature extraction on the image, and utilizes the extracted local and global multi-scale features to perform adaptive image fusion. The result shows that the spatial registration network obtains a good effect in the registration process, and the influence of the image distribution difference on the registration result is effectively eliminated; local multi-scale features provided by the multi-scale subtraction CNN well reserve brightness and detail information of the image, global multi-scale features provided by the MP