The Research of Positioning by Matching Radar's and Electronic Chart's Information Based on a Combination of Contour and Feature Points

摘要

In order to achieve radar positioning's automatization and improve its precision, this paper presents a researching method which uses navigation radar's and electronic chart's information to matching positioning. The research adopts a combination of contour's similarity degree and feature points to locate. And overcomes single matching's shortcoming which always make a unmatched mistake. Meanwhile, it can improve the positioning precision and ensure the needs of real-time positioning. In the paper, it discuss how to get the feature points of both radar echo image's contour and electronic chart image's contour, how to calculate contour's similarity degree and execute presumed positioning, how to establish the matching points of radar's and electronic chart's information feature, and how to obtain the most probable position by calculating optimal correct value of estimating position. At last, it demonstrates this research is feasibility and veracity by experimentations in many conditions of positioning.