针对摄影测量过程及所得点云数据的特征,利用模板法计算曲面曲率以确定曲面的精简比,对曲率图像进行非均匀网格滤波,实现了对摄影测量点云数据的精简。计算过程简洁方便,实验结果保持了原有数据的形态。该方法适用于摄影测量点云数据的后期处理。
This article demonstrates an algorithm for the reduction of cloud data achieved by photogrammetry.The algorithm computes curvature of discreet surface with differece template.Cloud data is filtered with non-uniform grid.The algorithm is clear and direct for computing and programming.Tests prove that high ratio of compression and good result which can be applied in reconstruction of curves and surfaces.