【摘要】 激光扫描系统得到的点云数据,密度大,包含有大量的冗余数据。针对这种数据的特点,对切片上的点云数据,提出了给定误差下的最小二乘非均匀B样条拟合法压缩点云数据的方法;对切片数目的精简,提出了累加弦长,并等分弦长,然后反算等分点在总弦长的位置来精简切片数目的方法。通过实例验证表明,该方法对点云数据处理的灵活性和适应性都较好,能够满足曲线和曲面重构的要求。更多还原

【Abstract】 The point cloud from laser scanning system has a high density,and lots of redundancydata are included.Based on this characteristic,an algorithmof least-square non-uniform B-Spline under the given error was put forward to compress the section point cloud,also an algorithm of chord accumulating,chord division and calculating the position of division points on the chord to compress the amount of section point cloud was given out.An example is given to testify that the method is effectual,feasible and meet the require of the reconstruction of curves and surfaces.更多还原