摘要
针对传统的镶嵌方法无法实现高重叠度机载合成孔径雷达(SAR)影像快速、无缝镶嵌的问题,该文基于顾及重叠的面Voronoi图,提出了一种接缝线网络生成及优化方法。采用改进的八邻域边界跟踪算法提取影像有效区域并将其简化为四边形,利用改进的中轴线算法提取重叠区的接缝线并对影像有效区域进行切分生成互不重叠的Voronoi面,快速生成初始接缝线网络;提出了一套接缝线优化方法,实现了机载SAR影像高重叠度高、重叠情况复杂易导致的接缝线网络的孔洞消除。利用高分辨率机载SAR影像对本文算法进行验证,结果表明该方法有效克服了机载SAR影像镶嵌的小孔洞问题,能生成无缝且唯一的接缝线网络,从而实现影像的高效、自动镶嵌。
Aiming at the problem that traditional mosaic methods cannot achieve fast and seamless mosaicking of airborne synthetiv aperture radar(SAR)images with high overlap,a seamline network generation and optimization method based on overlapping surface Voronoi diagrams was proposed in this paper.The improved eight-neighbor boundary tracking algorithm was used to extract the effective area of the image and simplify it into a quadrilateral,and the improved central axis algorithm was used to extract the seam line of the overlapping area and segment the effective area of the image to generate non-overlapping Voronoi surfaces,and the initial seamline network was generated;a seamline optimization method was proposed,which could eliminate the holes in the seamline network caused by the high overlap of airborne SAR images and the complex overlapping situation.The proposed algorithm was verified by using high-resolution airborne SAR images.The results showed that this method effectively overcomed the problem of small holes in airborne SAR image mosaics,and could generate a seamless and unique seamline network,thereby realizing efficient and automatic mosaicking.
作者
韩雅鑫
程春泉
杨书成
HAN Yaxin;CHENG Chunquan;YANG Shucheng(Chinese Academy of Surveying and Mapping,Beijing 100036,China)
出处
《测绘科学》
CSCD
北大核心
2022年第12期131-137,共7页
Science of Surveying and Mapping
基金
高分辨率对地观测重大专项航空观测系统项目(30-H30C01-9004-19/21)
中国测绘科学研究院基本科研业务费项目(AR2105)
