中文摘要：

针对当前曲线弯曲识别方法的不足，提出一种基于多叉树结构的曲线弯曲表达方法。该方法以曲线轴线作为弯曲划分基准，通过递归方式层次化提取不同方向、不同区间上弯曲，根据提取结果生成弯曲多叉树。最后通过曲线综合试验验证了方法的有效性。

英文摘要：

According to the defects of current bend identification methods, a multi-way tree structure for representation of curve bends is proposed. The method uses curve axis to identify curve bends. Bends which exist in different directions and different ranges of curves are extracted hierarchically by a recursive way and a multi-way tree of bends is generated according to extraction results. Finally, the multi-way tree of bends is used in the experiment of line generalization and verifies its effectiveness.