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基于层间联系的三维扫描盲区填充方法


  摘 要:针对三维文物扫描中出现的绝对盲区问题,提出了一种快速高效的、基于层间联系的三维填充方法。该方法对传统的边界点提取方法、离散点插入方法和三角剖分方法进行了适应性改进,并将以上三种方法和三角片品质优化同步进行,提高了填充的效率和准确率。该方法充分利用盲区当前最内层边界点之间距离和方向关系,向内逐层插入离散点,逐层进行三角剖分,利用相邻层顶点间的拓扑关系,逐层优化三角片,并动态更新当前层,层层推进。实验表明,新方法能够实现三维文物表面快速、光顺地填充。

  关键词:扫描盲区; 填充; 点云数据; 三角剖分

  中图分类号:TP391.41文献标志码:A

  文章编号:1001-3695(2010)07-2776-04

  doi:10.3969/j.issn.1001-3695.2010.07.107

  Filling method for three-dimensional scanning blind-areabased on layer associations

  WANG Meng-yang1 ,GENG Guo-hua 1, ZHOU Ming-quan1,2, GAO Yuan1

  (1.College of Information Science & Technology, Northwest University, Xi’an 710127, China; 2.College of Information Science & Technology, Beijing Normal University, Beijing 100875, China)

  Abstract:To solve the problem of scanning blind-area appearing in scanning 3D relic, this paper gave a fast and efficient method of filling based on layer associations. The method improved the traditional method of picking up boundary points, of inserting the discrete points and triangulation, to make them suitable. The method also made the above three kinds of methods and the quality triangle parallel, in order to improve efficiency and accuracy of filling. The method took full advantage of the distance-direction relationship between the boundary points in which the innermost layer that in blind-area, to insert the discrete points and triangulation layer by layer, and using of topological relations between vertices adjacent layers, to optimize triangle. While dynamically update the current layer, layer by layer. The experiment shows, the new method can fill up the 3D relic surface speedily and smoothly.

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