一种结构对称的破碎青铜文物的数字修复方法

A digital restoration method for broken bronze artifacts having a symmetrical structure

为有效解决结构具有对称性的破碎文物的数字修复问题,本研究利用计算机技术,提出了一种针对结构具有对称性的破碎青铜器文物的数字修复方法。首先利用三维激光扫描仪实现破碎文物的三维建模,然后采用基于特征点集的最小二乘方法计算破碎文物的对称平面,进而利用对称性实现破碎文物的数字修复。针对对称性计算的镜像模型与原始模型几何造型不完全一致的问题,采用非刚性配准方法实现了镜像模型的几何变形。实验结果表明,本方法能够实现破碎文物的数字修复,将为实体修复提供借鉴和指导。

This paper proposes a digital method based on computer technology for restoration of broken bronze artifacts having a symmetrical structure. First,a three-dimensional laser scanner is used to construct an artifact model based on currently available information. Second,the symmetryplane of the broken artifact is computed using the least squares method for finding feature points,which are selected manually. Finally,the restoration result is obtained based on the symmetrical structure of the artifact. In order to solve the problem that exists due to the difference in shape between the reflection model based on a symmetrical plane and original incomplete model,a non-rigid registration method is used to warp the reflection model in order to make the final restoration model appropriate. The feasibility and usability of the algorithm is confirmed by experiments. This restoration method can be of use to artifact conservation experts.