Systematically understanding shape from two perspectives of the feature and boundary model has the same advantage as algorithm of both model inducting and understanding from the bottom to top.

• 从特征模型和边界模型两种角度复合地理解形体，兼有模型引导和自底向上两类算法的优点，在此基础上提出了一种针对工程图的三维重建的实施方案。