首页 | 本学科首页   官方微博 | 高级检索  
     检索      

从机载激光雷达点云提取建筑物屋顶边界的活动轮廓模型改进方法
引用本文:孙颖,张新长,罗国玮.从机载激光雷达点云提取建筑物屋顶边界的活动轮廓模型改进方法[J].测绘学报,2014,43(6):620-636.
作者姓名:孙颖  张新长  罗国玮
作者单位:1. 中山大学; 2. 中山大学地理科学与规划学院
基金项目:国家自然科学基金(41071246);国家863计划(2013AA122302);高等学校博士学科点专项(20120171110030)
摘    要:本文基于边缘与局部信息提出了一种处理多波段图像的活动轮廓模型,并将其应用于LiDAR数据的建筑物边界提取。本文首先将分类得到的屋顶点云数据转换为栅格数据,并作为模型的输入图像,进而采用变分水平集方法解求模型能量函数的最小解,得到建筑物的边界。该模型消除了其他活动轮廓模型对初始曲线和所处理图像类型的限制,适于任意形状的建筑物边界的自动提取;水平集规则项的添加,减小了模型的计算时间。实验结果表明:与IAC模型、GACcolor模型相比,本文模型在建筑物边界提取的应用中可以达到更高的匹配度、形状相似度以及位置精度。

关 键 词:主动轮廓模型  LiDAR点云  IAC模型  RSF模型  建筑物边界提取  水平集方法  
收稿时间:2013-12-20
修稿时间:2014-03-10

Improved Active Contour Model for Building Roof Boundary Extraction from LiDAR Point Cloud
Abstract:Based on the edge and the local region information,this paper proposes a new active contour model, which can process multi-spectral image, and it is used to extract the building roof boundary from LiDAR data. The input image of our model is processed by Microstation software,we first classify the LiDAR point cloud and then convert the classified results to raster format. Our model is solved by variational level set method, and the minimal solution is the exact building roof boundary. It can eliminate the restrictions on the initialization and the image types of ACM, and it is suitable for the automatic extraction of any shape of building roof boundaries. In addition,we reduce the computational time of our model by adding the level set rules. Building roof boundary extraction experiment result indicates that our model can obtain higher accuracy in matched rate、shape similarity and positional accuracy than the IAC model and the GACcolor model.
Keywords:
本文献已被 CNKI 等数据库收录!
点击此处可从《测绘学报》浏览原始摘要信息
点击此处可从《测绘学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号