SAR (Synthetic Aperture Radar) image registration method, device, equipment and medium

The invention discloses an SAR image registration method and device, equipment and a medium, and relates to the technical field of image processing, and the method comprises the steps: obtaining a current SAR image and a corresponding historical SAR image; calculating an overlapping ratio of the current SAR image and the historical SAR image according to a preset rule, determining an overlapping region when the overlapping ratio is not lower than a first preset threshold value, and screening out a first region image and a second region image from the current SAR image and the historical SAR image based on the overlapping region; registering the first area image by using a correlation matching method based on the second area image to obtain an initial registration image, and judging whether a corresponding correlation coefficient is greater than a second preset threshold value or not; and if yes, performing block processing on the initial registration image and the second area image, and based on each block of