中文摘要：

为解决基于特征的逆向工程中反射对称提取的问题,提出一种鲁棒的对称面提取方法。首先利用特征线将模型分割成体素的集合,然后计算各个体素的形状分布曲线,通过形状分布曲线匹配的方式获几何形状相似的体素,并利用最小包围盒从中提取大小相似的体素以构成对称体素的集合。最后利用鲁棒的主元分析方法提取了反射对称体素的对称面信息。实验结果表明对称提取结果的误差较小并具有较强的鲁棒性。

英文摘要：

To solve the problem of symmetry plane extraction in feature based reverse engineering, a robust algorithm was presented. The model was segmented into voxels set based on its feature lines. For each voxel, shape distribu- tion histogram was calculated, and voxels with geometry similarity were obtained through shape distribution func- tion. The set of symmetric voxels was constructed by ones which had similar minimum bounding box. The symme- try plane was computed by robust principle component analysis. The experimental results showed that the extracted symmetry information was accurate and had robust.