检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]信息工程大学测绘学院 [2]北京61135部队
出 处:《测绘科学》2010年第4期91-93,共3页Science of Surveying and Mapping
摘 要:本文在研究了小波多分辨率分析原理的基础上,将小波变换引入到机载LIDAR数据滤波中,利用金字塔分层理论实现原始DSM数据的快速组织,加快计算速度,提高滤波效率。同时在滤波阈值选择中顾及整个区域的方向高程差,使判断条件更加符合地形特点,提高滤波的准确度。本文最后利用实际的LIDAR数据进行了实验和精度分析。After studying the principle of wavelet multi-resolution analysis, this paper took wavelet transform into LIDAR data filtering. By making use of pyramid-delaminating theory, the fast organization of raw DSM data came true, while the computing speed increased and the filtering speed improved. At the same time, by considering the directional height tolerance of the whole region in the process of filtering threshold selection, determining factors were made better accordance with topographic characteristics to improve the precision of filtering. At last, experiment was carried out on DSM data produced by LIDAR, and the results proved the validity and ad- vantage of the advanced filtering method.
关 键 词:LIDAR DSM 小波变换 多分辨率分析 滤波
分 类 号:P23[天文地球—摄影测量与遥感]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.200