Automatic registration method and device of high-precision synthetic aperture radar image

The invention discloses an automatic registration method of a high-precision SAR image. The method comprises the following steps that pixel level translation parameters between a main image and an auxiliary image are obtained; translation is conducted on the main image according to the pixel level translation parameters, and a translational main image is obtained; a normalization phase correlation matrix of the translational main image and the auxiliary image is obtained; stable phases of the normalization phase correlation matrix are obtained, the stable phases are respectively averaged in the row direction and the column direction of pixels, and a column vector V1 and a row vector V2 are obtained; a false SVD method is adopted for the column vector V1 and the row vector V2, and sub pixel level translation parameters between the translational main image and the auxiliary image are obtained; translation is conducted on the main image according to the sub pixel level translation parameters. The invention further discloses an automatic registration device of the high-precision SAR image. By the adoption of the automatic registration method and device, sub pixel level image registration can be achieved.