期刊
REMOTE SENSING
卷 13, 期 22, 页码 -出版社
MDPI
DOI: 10.3390/rs13224637
关键词
synthetic aperture radar (SAR); SAR image registration; ridge detection; large geometric distortion; graph isomorphism
类别
资金
- Natural Science Foundation of China [62071499]
- Key Areas of R&D Projects in Guangdong Province [2019B111101001]
This study introduces a multi-hypothesis topological isomorphism matching method for SAR images with large geometric distortions, which achieves keypoint matching by utilizing ridge-line keypoint detection and multi-hypothesis topological isomorphism matching. The method improves matching performance by considering both local and global geometric relationships between keypoints.
The dramatic undulations of a mountainous terrain will introduce large geometric distortions in each Synthetic Aperture Radar (SAR) image with different look angles, resulting in a poor registration performance. To this end, this paper proposes a multi-hypothesis topological isomorphism matching method for SAR images with large geometric distortions. The method includes the Ridge-Line Keypoint Detection (RLKD) and Multi-Hypothesis Topological Isomorphism Matching (MHTIM). Firstly, based on the analysis of the ridge structure, a ridge keypoint detection module and a keypoint similarity description method are designed, which aim to quickly produce a small number of stable matching keypoint pairs under large look angle differences and large terrain undulations. The keypoint pairs are further fed into the MHTIM module. Subsequently, the MHTIM method is proposed, which uses the stability and isomorphism of the topological structure of the keypoint set under different perspectives to generate a variety of matching hypotheses, and iteratively achieves the keypoint matching. This method uses both local and global geometric relationships between two keypoints, hence it achieving better performance compared with traditional methods. We tested our approach on both simulated and real mountain SAR images with different look angles and different elevation ranges. The experimental results demonstrate the effectiveness and stable matching performance of our approach.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据