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中文摘要：
基于点模型的有向包围盒树，首先建立点模型带拓扑信息的简化模型，基于这种几何表示，将网格模型的层次分片算法推广到点模型中．为解决大规模点模型的分片速度和分片效果之间的矛盾，将有向包围盒树与层次分片技术相结合，实现了多分辨率层次点模型分片．实验结果表明，文中算法能直接处理大规模点模型，且具有速度快、对噪声数据不敏感的优点．
英文摘要：
Based on Oriented Boundary Box Tree （OBBTree） of point cloud model, a simplified model with topological information is constructed first. Then based on this model representation, a hierarchical segmentation algorithm is implemented. To achieve good balance between speed and segmentation effect for large scale point model, the OBBTree is combined with the hierarchical point data segmentation, and a multi-resolution hierarchical point model segmentation algorithm is proposed for large scale point model. Experimental results are presented to demonstrate that the proposed algorithm is robust and efficient.
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