| 朱红斌,王文成,吴恩华.三维模型骨架的矫正.软件学报,2004,15(zk):206-214 |
| 三维模型骨架的矫正 |
| Rectifying the Skeleton of 3D Models |
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| DOI： |
| 中文关键词: 矫正 骨架 距离场 三维模型 |
| 英文关键词:rectify skeleton thedistancefield 3D model |
| 基金项目:Supported by the National Natural Science Foundation of China under Grant Nos．60373051，60173022，60033010(国家自然科学基金)；the National Grand Fundamental Research 973 Program of China under Grant No．2002CB312102(国家重点基础研究发展规划(973))：the Research Grant of University of Macao of China(澳门大学基金资助项目) |
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| 中文摘要: |
| 对复杂的三维模型进行骨架提取时，目前用各种骨架提取方法得到的骨架均可能产生偏离中心位置和冗余分支的失误情况．为此，提出一种骨架矫正方法，以改正骨架中的这些质量问题．在基于距离场提取骨架后，该方法对骨架的各个关节点进行如下的考察：以关节点为中心，向四周均匀发出辐射线与模型边界相交得到辐射线段，统计这些线段长度的分布以探知该关节点是否位于中心位置．对于偏离中心位置的关节点,使它向中心位置偏移，并修改相应的骨架分支，从而实现骨架的自动矫正．实验表明，新方法能很好地矫正三维骨架，且矫正速度很快，一般不超过骨架抽取时间的2％． |
| 英文摘要: |
| In extracting the skeleton from the 3D complex model，the existing methods may produce errors that some branches are away from the center positions and some branches are redundant．As for this，a rectification method is proposed in this paper to correct these errors．After a coarse skeleton is extracted based on the distance field of the 3D model，the method investigates every joint to see whether it is away from its local center position． The investigation work by omitting radial rays evenly with thejoint as the starting point to intersect the model’s surfaces and studying the length distribution of the segments from the joint to the intersection points along the rays.For the ioints away from the center positions，they are moved to the center and their related branches are also modified．Thus，the skeleton can be rectified automatically．Experimental results show the new method can efficiently rectify the skeleton and run fast，and generally the time for rectification takes up less than 2％ of the time for extracting the skeleton． |
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