2D-3D转换:由二维线画图生成三维复杂零部件  

2D to 3D:3D Complex Mechanical Objects Generation from 2D Line Drawings

作　　者：缪永伟[1,2] 冯小红[2] 林海斌[2] 张旭东[2] 高飞[2] MIAO Yongwei;FENG Xiaohong;LIN Haibin;ZHANG Xudong;GAO Fei(School of Information Science and Technology, Zhejiang Sci-Tech University, Hangzhou Zhejiang 310018, China;College of Computer Science and Technology, Zhejiang University of Technology, Hangzhou Zhejiang 310023, China)

机构地区：[1]浙江理工大学信息学院,浙江杭州310018 [2]浙江工业大学计算机科学与技术学院,浙江杭州310023

出　　处：《图学学报》2017年第2期162-169,共8页Journal of Graphics

基　　金：国家自然科学基金项目(61272309)

摘　　要：在计算机辅助概念设计和计算机图形学领域,利用二维线画图输入可以方便用户有效地创建新的复杂物体。根据输入的二维特征线画图,提出了一种有效的三维重建方法来生成包含带状面、内嵌圆柱面和空心多边形面等的三维复杂零部件物体。在假设输入的二维线画图是三维待重建物体的简单平行投影的前提下,首先引进用户手绘输入二维特征线画图的若干规则,有助于实现对二维线画图的解释以及对几何物体拓扑结构的有效识别。然后,利用立方角理论精确计算复杂零部件物体各顶点的三维坐标。最后,根据二维线画图的拓扑结构信息,高效重建出复杂零部件物体,并以三角网格的形式表示。实验结果表明,该方法能够精确、高效地生成诸如机械零部件等的三维复杂形状。In the literature of computer-aided conceptual design and computer graphics,the3D reconstruction of geometric solids from single2D line drawings provides the user an easy way for efficiently generating new complex objects.According to a user input2D line drawings that may include not only straight sketch lines but also sketch curves,an efficient and convenient reconstruction approach of3D complex mechanical objects is presented in this paper that may contain the ribbon-like faces,inner cylindrical faces and hollow polygonal faces,etc.Due to the pre-defined assumption that the given2D line drawings is a single parallel projection of3D shapes,our reconstruction technique firstly introduces a series of input rules for efficiently interpreting the user input2D line drawings and thus recognizing the topological structure of the geometric solids.Then,the algorithm computes the accurate3D coordinate information of vertices by using cubic corner theory.Based on the user specified topological information of2D line drawings,the complex mechanical objects are finally reconstructed and represented as triangular meshes.Experimental results demonstrate that our reconstruction scheme can efficiently generate the comparatively complex geometric solids in a deterministic manner,especially for3D complex mechanical objects.

关 键 词：三维重建 二维线画图 复杂零部件物体 立方角 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]