中文摘要：

兵马俑碎块是具有一定厚度的刚体，对其断裂面的分割是兵马俑复原工作中的一个重要步骤。针对兵马俑碎块的三角网格数据模型，提出一种兵马俑碎块断裂面分割方法。首先，计算该数据模型上各个顶点的体积积分不变量，以提取曲面的边界特征点；然后，通过最小生成树算法和剪枝策略得到闭合边界线；最后，提取碎块的曲面并识别原始面和断裂面，从而完成碎块断裂面的分割。实验结果表明，在断裂面较原始面粗糙的情况下，该方法能有效地完成兵马俑碎块的断裂面分割。因此说，该断裂面分割方法是一种有效的兵马俑碎块断裂面分割方法。

英文摘要：

The Terracotta Warrior block is a rigid block with some thickness,and it's fracture surface segmentation is an important work of Terracotta Warrior restoration.Aiming at triangular mesh data model of Terracotta Warrior blocks,an effective fracture surface segmentation method was proposed here.Firstly,the feature segmentation points were extracted by calculating the volume integral invariant of each vertex on surfaces.Secondly,the closed boundary lines were solved by minimum spanning trees algorithm and pruning strategy.Finally,all the surfaces were extracted and the fracture surfaces were distinguished from original surfaces.The experimental results showed that the proposed method could effectively complete fracture surface segmentation of the Terracotta Warrior block when the fracture surfaces were rougher than original surfaces.So the proposed fracture surface segmentation method is an effective fracture surface segmentation way of Terracotta Warrior blocks.