基于约束的结构类零件特征模型重建是反求工程中一个新的研究方向，具有很强的理论意义和实用价值。
The research on constraints based structural feature model reconstruction method is a new aspect in reversing engineering, which can be used to reconstruct more reliable model.
研究了基于草图轮廓的拉伸与旋转特征模型重建的生成方法，以实例零件说明本文提出的重建方法是切实可行的。
The generation methods of sketch-based feature model reconstruction are presented in this thesis. Experimental results show that the methods presented here are reliable.
该方法以投影为基础，以平高分解为手段，通过在多个投影平面内逐步确定平面、高程信息实现特征线提取及模型重建。
This study proposed an algorithm for building model reconstruction from airborne laser scanning data, based on feature line detection and separation of planimetric and height computations.
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