目的 对3维角色模型进行语义化检索与重组的前提是进行准确的分割和标记。针对游戏与影视中应用广泛的3维角色模型，提出一种基于结构先验知识的角色部件分割和标记方法。方法 总结了动画角色模型的一般性结构规则，并形式化为可以指导分割的层次化知识表达；采用区域生长法逐层剥离模型部件，在此规则下进行末端检测与边界判断，同时对部件进行语义标记。结果 通过描述结构规则，在两足与四足角色模型上进行分割测试，得到了适合于重组的角色部件。结论 与其他可标记的角色模型分割方法相比，该方法具有更好的部件化结果，以及对动画角色有良好的扩展性。

Objective The precondition of a 3D model retrieval and synthesis with semantics is accurate segmentation and labeling. For the 3D character model widely used in games and movies, we propose a method of character parts segmentation and labeling for animation based on a priori knowledge of the structure. Method After the structure rules of the animation character model are generalized, the rules are formalized with a hierarchical knowledge expression that can instruct segmentation. The regional growth method is used to detach the model parts layer by layer when the extremity detection and the boundary judgment can be guided by the rules. Simultaneously the parts are labeled a semantic name. Result Our method is tested on the biped/quadruped character model through the structure rules description. The segmentation results are character components that are suitable for synthesis.Conclusion Compared to other methods of character model segmentation with labeling, the result of our tests indicate that our method has more obvious parts, which can support model synthesis and has good extensibility to animation character.