基于A*算法的遥感影像镶嵌线检测  

A morphological method of seamline detection based on A*algorithm

作　　者：武龙飞 卢会龙 刘金号 李玉飞 WU Longfei;LU Huilong;LIU Jinhao;LI Yufei(China HebeiJiankan Group Company Limited, Shijiazhuang Hebei 050000, China)

机构地区：[1]中冀建勘集团有限公司,河北石家庄050000

出　　处：《北京测绘》2022年第3期233-237,共5页Beijing Surveying and Mapping

摘　　要：针对数字正射影像镶嵌难以保证地物完整性问题,提出了一种基于A*算法的数学形态学镶嵌线检测方法。该方法,首先利用同名像点计算相邻影像的重叠区域并计算对应区域灰度差值影像;然后,对差值影像采用数学形态学方法进行优化,通过多层金字塔分级策略结合八邻域A*算法计算镶嵌线,即确保生成镶嵌线的质量又提高算法的检测效率。试验表明,该方法能检测出一条较短且不穿越房屋等非地面区域的最优路径,保证了地物的完整性。In this paper,a morphological method of seamline detection based on A*algorithm for orthoimage mosaicking was proposed.The differential image was generated according to the difference of grey values of the homonymous image points and optimized using morphological method.The seamline was detected based on eight-neighbor A*algorithm and multi-level pyramid.The method guaranteed the quality of the seamline and improved the efficiency at the same time.The experimental results indicated that the semline which was detected based on the presented method was short and avoided crossing the non-ground areas such as buildings,ensuring the integrity of objects.

关 键 词：A*算法 数学形态学 镶嵌线检测 影像镶嵌 正射影像 

分 类 号：P231[天文地球—摄影测量与遥感]