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

Abstract

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.

Description

technical field [0001] The present invention relates to image registration technology, in particular to a high-precision Synthetic Aperture Radar (SAR, Synthetic Aperture Radar) image automatic registration method and equipment. Background technique [0002] In the integrated analysis of remote sensing images, image registration is the basis of remote sensing data analysis and processing, and a key link in application technologies such as image fusion, dynamic change detection, 3D terrain reconstruction, and remote sensing image mosaic. In recent years, remote sensing image automatic registration technology has developed rapidly, but the research on SAR image automatic registration is in its infancy. [0003] SAR image registration is the process of superimposing images of the same area or the same object obtained by different periods, different viewpoints, or different sensors. The distortion caused by the SAR images to be registered can be consistent in terms of gray scal...

AI Technical Summary

Problems solved by technology

However, the problem with these registration methods is that the amount of calculation will increase sharply when obtaining high-precision image registration information. How to achieve high-precision sub-pixel registration with a low amount of calculation is an urgent need. solved problem

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