【作者】 张涛；

【导师】 姚俊峰；

【作者基本信息】 厦门大学 ， 计算机应用技术， 2007， 硕士

【摘要】 将三维技术应用到服装行业是计算机图形学的一个重要研究方向。如今三维计算机图形学的理论和技术已经应用到服装设计、生产、管理、销售等各个环节,在很大程度上提高了服装产品的生产质量和效率。本课题研究内容是2006年度国家“十一五”科技支撑计划和2006年度福建省高等学校新世纪优秀人才支持计划的子课题。研究课题可以分为两个主要部分:一部分是基于人体特征线的躯干曲面成形;另一部分是三维服装展示。论文的主要研究工作如下:如何快速构造一个三维人体曲面是三维服装技术的一个重点和难点,论文在研究已有算法的基础上,结合三维服装设计的要求,研究设计了一种基于人体特征线的躯干曲面成形方法。人体躯干是一种不规则的曲面,要使之成形并具有较好的可控制性有较大难度。论文根据人体学提出将人体躯干划分为六个基准特征线,并结合NURBS方法中权值为1的非均匀B样条曲线曲面理论,提出了一种躯干曲面成形的新方法。这种成形方法高效地处理密集不可控的躯干数据点,并快速形成躯干曲面。论文还研究设计了应用于躯干曲面成形的曲线曲面插值算法。经过基于人体特征线的躯干曲面成形方法构造的躯干曲面不仅保持了躯干表面特征,还提高了躯干表面特征可修改性可控制性的效率。用户根据自己的躯干特征线尺寸就可以得到躯干曲面。课题中躯干成形过程还涉及到:对三维躯干原始数据的压缩处理、构造人体特征线以及拟合曲面片等算法。这种成形方法为开发三维人体系统提供了理论基础和关键技术,具有重要的基础作用。这种成形方法也存在修改尺寸过大会造成躯干曲面失真的现象,这是下一步要改进的地方。针对传统展示方式的不足,论文探索了应用于服装展示的三维交互式展示方式。传统常见的产品展示往往缺乏真实感或者缺乏和浏览者之间的交互。论文研究开发了三维服装展示系统,论文中的三维服装展示方式涵盖了现今主要的三个信息交流平台:单台计算机、Internet以及手机。用户通过计算机、网络和手机就可以进行三维服装的浏览并通过对三维服装的实时交互操作和产品产生互动。课题综合了多种三维技术,包括3D建模技术、OpenGL技术、Web3D技术、J2ME以及JSR184技术。单机三维服装展示子系统的交互设计主要利用了3DS文件的块结构,通过循环读取块信息得到3D文件的重要信息并加以控制交互。网络三维服装展示子系统的交互设计主要利用Java3D技术关于3D文件的接口包对3D文件进行相应的读取并通过自定义函数进行交互功能的实现。手机三维服装展示子系统的交互设计主要利用专门应用于手机开发的JSR184技术对M3G格式三维文件进行读取及交互功能的实现。实验效果表明三维服装展示系统具有较好的三维展示效果,浏览者可以通过多种方式对三维服装模型进行旋转、缩放等多种交互操作。三维服装展示系统具有广阔的应用空间,可以为其他行业的产品展示提供技术基础。系统存在三维服装展示真实性和速度不够平衡的不足,这也是下一步要改进的地方最后,论文总结了课题的研究工作,并对课题研究的发展前景从技术上和应用上作了展望。更多还原

【Abstract】 How to apply 3D technology to garment industry has become an important research direction. The 3D computer graphic’s theory and technology has been used to apparel design、manufacture、management and selling.The research content of the thesis is the subprojects of "the national 11th-five-year science-technology support project" and "the Fujian new century elitist support project ".The thesis composes of two parts: one is feature-based human surface reconstruction; the other is three dimensional garment exhibition.The research content of the thesis is listed as follows:How to construct a three dimensional human surface quickly is the focus and difficulty of the three dimensional garment technology. The paper presents an easy way to construct personalized mannequin based on the requirement of the three dimensional apparel designs. This feature model is based on NURBS theories whose weight is set as 1. Aiming at the complicated characteristic of the human curved surface, this paper sets human body’s six key curves as the datum line and applies curve interpolation to construct the three dimensional human model. The method of forming of trunk curved surface keeps the feature of the trunk curve surface and advances the efficiency of controlling trunk curve surface. By the three dimensional trunk curved surface, users can get the virtual trunk with its own characteristic. This paper also refers to some other arithmetic, such as: compressing three dimensional original human data, constructing human datum curve and fitting the curve surface. This forming method supply 3D human platform with theoretical foundation and key technologies.But this method does not behaves well when the feature size is altered too much.Aiming at the insufficiency of traditional exhibition mode, the paper explores how to exhibit garment in a three dimensional and interactive way. Traditional exhibition mode lacks facility or the interactivity between the users and 3D objects. The paper researches and designs the system of three dimensional garment exhibition which composes of three parts: the system based on computer, the system based on Internet, the system based on mobilephone.Users can browse three dimensional virtual garments and interact with it. This paper refers to many technologies, such as 3D modeling, OpenGL, Web3D, J2ME and JSR184. The computer-based 3D Garment Exhibition Subsystem chiefly uses the structure fo 3DS file and circularly reads the chunks of 3DS.The internet-based 3D Garment Exhibition Subsystem chiefly uses the API of Java3D and interacts with 3D objects by self-defining function.The mobilephone-based 3D Garment Exhibition Subsystem chiefly uses the JSR184 criterion which is specially used for 3D mobilephone development.And the effect indicates that the three dimensional garment exhibition has good performance. In future the relation between display quality and display speed must be balanced forward.Finally, the paper summarizes the research work and gives perspectives of technology and application of the project更多还原