SAR image automatic registration method based on geometric topological relationship of feature points

Abstract

The invention discloses a SAR image automatic registration method based on the geometric topological relationship of feature points, which belongs to the field of remote sensing image processing and application. The present invention completes affine by extracting the image fixed area and centroid, determining the geometric topological relationship between non-collinear matching point pairs, finding a complete matching point set based on the geometric topological relationship, screening point sets with the same name, and image registration. The automatic registration of SAR images under transformation solves the problems of image grayscale and noise sensitivity in common SAR image registration methods, and has the advantages of strong anti-noise ability, high registration accuracy, and low algorithm complexity. And military reconnaissance and other aspects have a wide range of application prospects.

Description

technical field [0001] The invention relates to an image automatic registration method, in particular to a SAR image automatic registration method with an affine transformation relationship. Background technique [0002] Image registration is a process of linearly or non-linearly transforming two or more images of the same region or object obtained from different periods, different viewpoints, or different sensors, so that the two images can match geometrically. Its working principle is to use the feature point pairs with the same name in the reference image and the image to be registered to obtain the transformation relationship between the two images, so as to transform the coordinate system of the image to be registered into the coordinate system of the reference image. [0003] The parameter estimation of transformation relation is the key technology of automatic image registration. At present, there are mainly two approaches for automatic image registration: (1) method...

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Problems solved by technology

[0005] Aiming at the shortcomings of the existing SAR image automatic registration technology, such as low anti-noise ability of feature points and high computational complexity of points with the same name, a SAR image automatic registration method based on the geometric topological relationship of feature points is proposed.

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