Hierarchical 3D mechanical parts matching based-on adjustable geometry and topology similarity measurements

被引:0
|
作者
马嵩华 [1 ]
田凌 [1 ]
机构
[1] Department of Mechanical Engineering,Tsinghua University
基金
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词
D2 shape distribution; CSG tree; geometry dissimilarity; topology dissimilarity; adjustable weight;
D O I
暂无
中图分类号
TH13 [机械零件及传动装置]; TP391.7 [机器辅助技术];
学科分类号
080203 ; 081203 ; 0835 ;
摘要
A hierarchical scheme of feature-based model similarity measurement was proposed,named CSG;2,in which both geometry similarity and topology similarity were applied.The features of 3D mechanical part were constructed by a series of primitive features with tree structure,as a form of constructive solid geometry(CSG) tree.The D2 shape distributions of these features were extracted for geometry similarity measurement,and the pose vector and non-disappeared proportion of each leaf node were gained for topology similarity measurement.Based on these,the dissimilarity between the query and the candidate was accessed by level-by-level CSG tree comparisons.With the adjustable weights,our scheme satisfies different comparison emphasis on the geometry or topology similarity.The assessment results from CSG;2 demonstrate more discriminative than those from D2 in the analysis of precision-recall and similarity matrix.Finally,an experimental search engine is applied for mechanical parts reuse by using CSG;2,which is convenient for the mechanical design process.
引用
收藏
页码:89 / 99
页数:11
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