CAJ | 학술논문

激光点云数据NURBS曲线曲面重构一般采用参数化方法时,要求数据点是按照特殊规则排列的,即链式曲线和曲面网格.如果被测点是不规则空间排列,运用参数化方法会非常困难,拟合曲面可能会扭曲的很厉害.针对该问题,本文利用切片技术对散乱点进行曲线重建,首先采用曲率分析方法确定切片方向,然后以一定厚度的一系列平行平面与点云求交,对＂相交点集＂排序,再由参数化方法进行NURBS曲线重构.经实验验证,该方法在NURBS曲线重构中具有高效率性和计算稳定性.
격광점운수거NURBS곡선곡면중구일반채용삼수화방법시,요구수거점시안조특수규칙배렬적,즉련식곡선화곡면망격.여과피측점시불규칙공간배렬,운용삼수화방법회비상곤난,의합곡면가능회뉴곡적흔려해.침대해문제,본문이용절편기술대산란점진행곡선중건,수선채용곡솔분석방법학정절편방향,연후이일정후도적일계렬평행평면여점운구교,대＂상교점집＂배서,재유삼수화방법진행NURBS곡선중구.경실험험증,해방법재NURBS곡선중구중구유고효솔성화계산은정성.
In general,the parametric method to reconstruction NURBS curve and surface based on laser point cloud is used,but this method requires point cloud with special rules,such as chain curve and surface grid.If the point cloud is messy,it will be difficult to use this method and the fitting surface may distort it badly.To solve this problem,the slicing technology to reconstruct the curve of point cloud is used in the paper.First of all,the curvature analysis method is used to determine the direction of section,and the point cloud with a certain thickness of a series of parallel planes is intersected.Thirdly,the "intersection point set" is sorted out.At last,the parametric method is used to reconstruct NURBS curves.From the results of experiment,this method has efficient rate and calculation stability in reconstruction of the NURBS curve.