摘要
道路网络是城区SAR图像的重要组成部分,在灾后应急响应、图像匹配、GIS更新等方面有着重要作用。道路特征在高分辨率SAR图像上通常表现为区域特性,在道路片段的提取过程中会在道路交叉点附近发生断裂。提出一种道路片段连接的新方法。首先利用形态学处理提取道路交叉点,再利用道路交叉点将断裂的道路片段连接起来,从而提取出完整的道路网。使用0.5m分辨率的机载SAR图像进行切片实验,结果证明该方法不仅可以有效地将断裂的道路片段连接起来,并且能够有效地去除误提取的非道路片段,得到与实际情况相符合的道路网络。实验表明,该方法具有良好的正确率和品质因数。
Road network is the important part of the urban SAR image ,and it has major roles in emergency response , GIS database updating ,and image matching ,and so on .Roads in very high resolution（VHR） SAR image are dark areas , they will break around the road junction when extracting road segment .Road junction could be extracted by different method from road extracting method since they have different characters .Current road extracting method do not use road junction .This paper proposed a new method to connect road segments .Firstly ,road junctions are extracted by morpho‐logical transformation .Secondly ,connect broken road segments by using road junctions .In 0 .5 m high‐resolution air‐borne SAR image experiment ,the result indicates that the method not only connect road segments effectively ,but also wipe out false road segments validly ;the method could get the road network in agreement with the reality .The experi‐mental results show good performance with correctness and quality .
出处
《国外电子测量技术》
2015年第5期70-74,共5页
Foreign Electronic Measurement Technology
