【作者】 李翔；

【导师】 刘京南；

【作者基本信息】 东南大学 ， 检测技术与自动化装置， 2015， 硕士

【摘要】 随着3D打印时代和移动互联网时代的到来,人们对3D产品的需求越来越大,同时生活越来越离不开移动设备。其中作为打印技术的核心逆向工程技术越来越受到重视,对其进行研究成为计算机视觉领域重要分支之一,而在移动设备上进行研究更成为当下国内外研究的热点。点云变形和曲面光顺是影像反求技术的重要组成部分。本文在参考国内外文献的基础上重点对点云变形相关技术进行了研究和讨论,主要包括点云变形以及引发的光顺处理。最后在移动平台实现了基于C／S架构的工程试验。论文包括如下：1.综述课题研究背景及意义,概述研究的相关技术背景,包括影像反求技术,点云变形和曲面光顺的研究现状,以及具体实现平台所需要的相关软件技术。2.研究点云的自由变形相关技术,包括自由变形技术和基于点约束的自由变形技术,然后又介绍了高斯分布的相关特性,以及为提高算法在移动设备上计算速度,给出了基于阈值约束的点约束自由变形的改进。3.研究三维模型光顺技术的相关技术,包括拉普拉斯平滑算法、taubin平滑算法以及基于曲率流的平滑算法,然后考虑三维图像在变形后出现不均匀分布的尖点问题,对其算法进行了改进。4.详细介绍C／S架构下系统的总体设计及各模块实现,其中包括功能需求分析,服务器与客户端相关具体技术细节的实现。5.对点云变形和曲面光顺进行实验,介绍测试系统的调试,以及点云变形和曲面光顺实验的条件、工具以及相关步骤,同时对实验结果进行分析和评价。更多还原

【Abstract】 With the advent of the 3D printing era and the mobile Internet era, people demand for more and more 3D products hugely. And people become more and more inseparable from the mobile devices at the same time. Among them, the reverse engineering technology in the core of the printing technology is paid more attention to, and even becomes one of the important branches in computer vision field. Still studying on mobile devices is also becoming a hot spot of the present research at home and abroad. Point cloud of surface deformation and smoothing is an important part of reverse technology. In this paper, on the basis of reference literatures focus on point cloud deformation related technology are studied and discussed at home and abroad, mainly including point cloud deformation and smoothing processing. Finally implements the mobile platform based on C/S architecture engineering test. Thesis includes the following:1. The paper reviewed the background and significance of subject provides an overview of research related technical background, including reverse technology, research status quo of point cloud deformation and surface fairing, as well as concrete implementation platform required by the relevant software technology.2. The study of the point cloud free deformation related technologies, including free deformation technology and free deformation technique based on point constraints, and then introduces the related characteristics of Gaussian distribution. Then to improve the algorithm in computing speed on mobile device, based on threshold constraint point free deformation is introduced.3.3D model of fairing technology related technologies, including the Laplacian smoothing algorithm, Taubin smoothing algorithm and smoothing algorithm based on the curvature flow. Then the algorithm is improved considering problems of uneven distribution of cusp after 3D image deformed.4. The detail C/S architecture of the system overall design and the realization of each module, including functional requirements analysis, the realization of the server and client related to specific technical details.5. The point cloud of surface deformation and smoothing experiment and debugging test system is introduced in this paper, and the point cloud of surface deformation and smoothing experiment conditions, tools, and related steps. At the same time, the result of the experiment were analyzed and evaluated.更多还原