点云密度设置在激光扫描中的应用研究

基于地面三维激光扫描仪逐线扫描的测量方式,推导出任意空间平面内单位面积含有的扫描线列数及各扫描线包含的扫描点数,并由此得到严密的点云密度计算模型。利用该模型对扫描前水平、垂直方向角度步频率等参数进行计算,使其达到要求的点云密度。该方法通过严密计算模型得到扫描参数,由此既可满足密度要求,又提高了扫描效率,避免了一般扫描作业中依据经验进行参数设置的盲目性,在三维扫描测量作业中具有一定的指导意义。

Application of laser scan point cloud density setting

Based on the measurement by terrestrial laser scanners line scan, the scan points deduced sequence of scanning lines within each scan line containing an arbitrary plane in space that contains the unit area, and thus get tight density point cloud computing model. The model was scanned before horizontal and vertical an- gles step frequency and other parameters are calculated to meet the requirements of point cloud density. The scanning parameters obtained through rigorous calculation model, which can meet the density requirements, but also improves the efficiency of scanning, the scanning operation to avoid a general parameter setting based on experience blindness, has a certain significance in the three-dimensional scanning measurement operations.