顾及结构信息的DOM镶嵌线搜索算法  

An improved DOM seam line searching algorithm based on structual information

作　　者：焦晨静 陈时雨[1] 赵鹏祥[1] 

机构地区：[1]武汉大学遥感信息工程学院,武汉430079

出　　处：《测绘科学》2016年第1期190-193,共4页Science of Surveying and Mapping

摘　　要：针对数字正射影像镶嵌线搜索的传统算法大都只顾及灰度值差异而忽略影像结构信息的不足之处,该文根据镶嵌线的搜索准则,设计自动搜索一条能够避开高出地面的物体、不通过影像边缘且避开待镶嵌影像上灰度反差较大区域的镶嵌线:在原始影像上采用一个综合了灰度信息和结构信息的公式,计算出每一个像素的准则值;为了避免搜索陷入局部最优,采用动态规划的方法搜索出一条准则值最小的镶嵌线。实验表明,搜索出的镶嵌线能够避开房屋、树木等高出地面的地物和车辆等移动物体,避开影像上灰度反差大的区域。Aiming at the insufficiency of traditional searching algorithms for DOM seam lines that the grayscale differences were studied more than image structural information,the paper adopted a formula which combines both grayscale information and structural information to calculate the rule-value for each pixel according to the rule of searching seam lines;and to avoid the local optimum,a dynamic programming method was employed to search for the mosaic line with the least rule-value.Experiment results showed that the method would provide a seam line bypassing buildings,trees and moving objects such as cars,and avoiding the areas with obvious grayscale differences.

关 键 词：数字正射影像 镶嵌线 梯度 结构信息 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]