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Geometry Based Faceting of 3D Digitized Archaeological Fragments

机译:基于几何的3D数字化考古碎片刻面

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We present a robust pipeline for segmenting digital cultural heritage fragments into distinct facets, with few tunable yet archaeologically meaningful parameters. Given a terracotta broken artifact, digitally scanned in the form of irregularly sampled 3D mesh, our method first estimates the local angles of fractures by applying weighted eigenanalysis of the local neighborhoods. Using 3D fit of a quadratic polynomial, we estimate the directional derivative of the angle function along the maximum bending direction for accurate localization of the fracture lines across the mesh. Then, the salient fracture lines are detected and incidental possible gaps between them are closed in order to extract a set of closed facets. Finally, the facets are categorized into fracture and skin. The method is tested on two different datasets of the GRAVITATE project.
机译:我们提供了一个强大的管道,用于将数字文化遗产片段分割成不同的方面,几乎没有可调整但对考古有意义的参数。给定兵马俑破碎的假象,以不规则采样的3D网格形式进行数字扫描,我们的方法首先通过对局部邻域进行加权特征分析来估计裂缝的局部角度。使用二次多项式的3D拟合,我们可以估算沿最大弯曲方向的角度函数的方向导数,以便在网格上精确定位断裂线。然后,检测出明显的断裂线,并闭合它们之间可能的间隙,以提取出一组闭合的小平面。最后,将小平面分为骨折和皮肤。该方法在GRAVITATE项目的两个不同数据集上进行了测试。

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