摘要
三维激光扫描测量具有速度快、效率高、实时性强等特点,由于其数据量特别大,数据特别精细,在存储和运算上受到的限制比较大。针对上述问题本文讨论了三维激光扫描数据的压缩和滤波,针对地形采集的需要,探讨了在三维激光扫描数据上获取地形采样点的具体方法。同时实例针对三维激光扫描数据点距小的特点对原有数据进行按序抽点,通过计算回光强度熵的信息对压缩效果进行检验,并用压缩后的数据生成等高线。
Three dimensional laser ranger scanning has the characteristics of high speed, high efficiency and real time operation, etc. however, the limitation on the memory and computation in computer has been recognized for its lager volume of data and the detailed data depiction. So the issue of the compression and filtering of the data are discussed, and for the need of topographic data capture, the method based on the laser ranger scanning data is researched for the topographic sampling. Meantime, data interval sampling is given for the three dimensional laser ranger scanning by a case study, and the value of entropy for reflected intensity is calculated to verify the quality of the data compression, and contour lines are generated based on the compressed data.
出处
《遥感信息》
CSCD
2005年第2期6-10,共5页
Remote Sensing Information
基金
同济大学工科科技发展基金资助
关键词
三维激光扫描
数据压缩
数据滤波
地形等高线
three dimensional laser ranger scanning
data compression
data filtering
topographic contour lines
