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基于特征的刚体碎块断裂面层次化匹配方法

Hierarchical Matching Method for Fracture Surfaces of Rigid Blocks Based on Features
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摘要 刚体碎块断裂面的匹配是通过旋转和平移变换将两个断裂曲面变换到同一坐标系统下的过程。为了提高断裂面匹配的速度和精度,提出一种基于局部特征和改进迭代最近点(iterative closest point,ICP)算法的层次化的匹配方法。首先,对刚体碎块外表面进行曲面分割,并根据粗糙度提取其断裂面;然后提取断裂面的局部深度、法线的偏角和点云密度等局部特征;最后采用基于局部特征和改进ICP算法的方法来实现断裂面的精确匹配。实验结果表明,基于局部特征的断裂面匹配算法能够精确、快速地实现刚体碎块的部分匹配和完全匹配,是一种有效的刚体碎块匹配方法。 The fracture surface matching of rigid blocks is the process of making two surfaces transform into a common coordinate through rotation and translation transformation.To improve the matching speed and accuracy,a hierarchical matching method based on local feature and improved iterative closest point(ICP)was proposed.Firstly,surface of the block was segmented and the fracture surfaces were extracted according to the coarse degree.Secondly,local feature which included local depth,deviation angle of normals and point cloud density was extracted.Finally,fine registration of fracture surfaces was completed by algorithm based on local feature and improved ICP algorithm.The experimental results show that the fracture surface matching algorithm based on local feature can match fracture surfaces of rigid blocks accurately and rapidly,it is an effective matching method of rigid blocks.
作者 赵夫群 耿国华 ZHAO Fu-qun;GENG Guo-hua(School of Education Science,Xianyang Normal University,Xianyang 712000,China;School of Information Science and Technology,Northwest University,Xi'an 710127,China)
出处 《科学技术与工程》 北大核心 2018年第10期90-94,共5页 Science Technology and Engineering
基金 陕西省教育厅专项科研项目(15JK1797) 国家自然科学基金(61731015) 咸阳师范学院专项科研基金(XSYK17037)资助
关键词 断裂面匹配 曲面分割 局部特征 迭代最近点 动态迭代系数 fracture surface matching surface segmentation local feature iterative closest point dynamic iterative coefficient
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