Basic concepts and definition of suspended tree and extended contour are given, an algorithm to extract it is presented using techniques of dynamic local coordinate system and adaptive bounding box.
文中提出了悬树和扩展轮廓的概念，通过对扩展轮廓的分析和定义，使用动态坐标系和动态包围盒技术，设计了一个扩展轮廓的求取算法。
Basic concepts and definition of suspended tree and extended contour are given, an algorithm to extract it is presented using techniques of dynamic local coordinate system and adaptive bounding box.
文中提出了悬树和扩展轮廓的概念，通过对扩展轮廓的分析和定义，使用动态坐标系和动态包围盒技术，设计了一个扩展轮廓的求取算法。
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