本文提出了一种草图指导的三维模型特征线提取方法，该方法特点在于：一方面，建立了笔画采样点与模型特征线点间的条件随机场匹配模型，将模型几何特征与形状相似性结合匹配，实现了草图信息与模型特征线提取的有效融合；另一方面，提出了基于结构相似性的模型特征线度量机制，并采用迭代优化方法实现了全局最优模型特征线的提取。实验结果表明：本文提出的方法能有效获取与草图结构形状相对应的模型特征线绘图。%This paper proposed a 3D model feature lines extracting method guided by user′s sketch .There are two main con-tributions of our method :on the one hand ,a conditional random fields (CRF )-matching model with geometric features and shape similarity between stroke points and candidate feature points is established ,and the user drawing purpose is combined with the model feature lines extraction effectively ;on the other hand ,a topological similarity based metrics is proposed to evaluate the rationality of extracted feature lines ,and an iterative optimization process is applied to obtain global optimized model feature lines .The experi-mental results show that our method is efficient to extract reasonable 3D model feature lines which are similar to sketch strokes on shape and topological properties .
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