三维重建网格模型的缺陷孔洞识别与修复方法

Defective hole identification and hole-filling for 3D reconstruction mesh models

针对三维重建网格模型经常出现异常缺失孔洞的问题,提出一种缺陷孔洞自动识别与孔洞区域细节特征保持的曲面修复方法。首先对缺失区域的上下文及轮廓曲线进行异常检测以判断是否为缺陷孔洞,确认为缺陷孔洞后对孔洞周边的特征线进行检测与匹配构造孔洞区域的基曲面;之后引进一个无约束的三角剖分对基曲面进行三角化;最后利用网格的各向异性进行细化及形态调整,改善网格的拓扑结构和几何性质。实验结果表明,该方法能够有效地识别三角网格模型的缺陷孔洞区域并还原其细节特征。

Aiming to solve the problem of abnormal missing holes occurred in 3D reconstruction mesh models frequently,this paper proposed a novel method that hole-defect identification automatically and detail-preserving surface repair around the hole.Firstly,in order to determine whether the hole was a real defective hole,it detected the context irregularity and contour irregularity of the missing region.After that,it detected and matched the feature lines around the hole,which were to form the fundamental surface of the hole area,and then it introduced unconstrained triangulation for basal surface.Finally,it made use of the anisotropy of mesh to refine and adjust morphologically to improve the topological and geometric properties of the mesh.The experimental results show that the proposed method can identify the defective hole and restore the hole area’s detail features of triangular mesh models effectively.