Characteristic matching method based on straight line characteristic image registration

Abstract

The invention discloses a feature matching method in image registration based on straight-line features, aiming at solving the feature matching problem in image registration based on straight-line features; the technical proposal of the invention comprises the following steps of: firstly, extracting straight-line grouping from a reference image and an image to be registered as a registration primitive and defining a matching matrix M; then calculating reliability measure, similarity measure and consistency measure of spatial relationship between the straight-line grouping of the two images andobtaining a reliability measure matrix R, a similarity measure matrix B and a consistency measure matrix S of spatial relationship; then establishing an energy function which takes the M as argumentand transforming the matching problem of straight-line grouping into the optimization problem of the energy function; finally adopting a two-step iterative optimization algorithm to carry out iterative optimization for the optimization problem of the energy function; the invention combines the reliability, the consistency of the spatial relationship and the similarity of the straight-line groupingorganically in the process of feature matching, overcomes the defects that in the existing method, the calculation is complex, the wrong matching is easy to occur and the obtaining of corresponding image points is not accurate.

Description

technical field [0001] The invention belongs to an image registration method in the technical field of image processing, in particular to a method for matching based on straight line features extracted from two images during the image registration process. Background technique [0002] Image registration is an important module in various remote sensing image processing software and medical image processing software. It is a key step in remote sensing image fusion, environmental monitoring, change detection, image mosaic, weather prediction and medical image processing. Geometric correction is performed on two or more images of the same region or object acquired by different time periods, different viewpoints or different sensors to make them consistent in spatial position. The registration problem between multiple images can often be decomposed into multiple registration problems between two images. Therefore, the image registration problem is mainly to study the geometric c...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to propose a new line feature matching method, which overcomes the defects of complex calculation, easy to cause wrong matching and inaccurate acquisition of the same-named image points in the existing method, and solves the problem of feature matching in image registration based on line features. matching problem

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