CAJ | 학술논문

以三维激光扫描的不同分辨率树木枝干点云数据为数据源，分别使用迭代的凸包算法和三角网生长法提取其不同层次的等值线模型和Delaunay三角网格模型，并使用射线碰撞检测技术提取以上模型的形态参数。通过对比分析表明，当分层数相同时，使用不同分辨率的模型提取的参数精度相差不大，与实际测量数值相比误差在5％以内；而当分辨率一定时，层数越多的模型，其效果越好，提取的参数精度越高。因此，在三维激光扫描仪的使用过程中，可适当降低分辨率以减少扫描时间，而在建模的过程中，通过提高分层数量以此获得较好的模型表现效果。
이삼유격광소묘적불동분변솔수목지간점운수거위수거원，분별사용질대적철포산법화삼각망생장법제취기불동층차적등치선모형화Delaunay삼각망격모형，병사용사선팽당검측기술제취이상모형적형태삼수。통과대비분석표명，당분층수상동시，사용불동분변솔적모형제취적삼수정도상차불대，여실제측량수치상비오차재5％이내；이당분변솔일정시，층수월다적모형，기효과월호，제취적삼수정도월고。인차，재삼유격광소묘의적사용과정중，가괄당강저분변솔이감소소묘시간，이재건모적과정중，통과제고분층수량이차획득교호적모형표현효과。
With branches point cloud of different resolution as the data source, we extracted contour models and Delaunay trian-gular mesh model with different levels using iterative convex hull algorithm and triangulation growth algorithm respectively, and extracted the morphological parameters of these model by ray collision detection technique .By comparison , the accura-cy of parameters extracted using models with different resolution differs little when stratified with the same number , and the error is less than 5%compared with the values in the actual measurement .When the resolution is certain, the more layers the model has, the better the effect is and the higher the accuracy of the extracted parameters is.Therefore, it may be ap-propriate to reduce the resolution to reduce the scan time in the process of 3D laser scanner, and increase the number of hierarchical to get a better model performance results in the modeling process.