基于特征基因的草图三维造型方法研究

发布时间：2018-05-30 07:53

本文选题：三维造型 + 三维模型线表示方法　；参考：《浙江大学》2012年硕士论文

【摘要】：动漫、玩具和电影产业是文化创意产业的重要组成部分,正处于快速发展时期,但是随着发展水平的逐渐提高,我国在产品创新设计方面的不足,成为了制约这些产业发展的主要瓶颈。结合国家863计划项目“柔性复杂产品快速创意数字化设计方法研究及其应用”(2009AA04Z103),本文对产品的创新设计的重要组成部分——三维造型设计进行了深入研究。产品三维造型设计由于具有几何形状的完全表达能力,正在产品创新设计中占据越来越重要的地位。但是现有三维造型软件操作复杂,不能很好地支持手绘草图,限制了企业的产品设计能力。为此本文提出了利用特征基因表达三维模型几何特征,通过草图绘制语义修改特征基因,并进一步实现三维模型变形的三维造型方法,从而实现草图三维造型。全文共分为以下六章：第一章：概述了我国动漫、玩具和电影行业发展现状,阐述了其产品设计现状以及其中存在的问题,并对国内外相关领域的研究情况进行了借鉴性介绍。由此给出了本文的研究内容和研究思路。第二章：给出了特征基因的定义、提取和优化方法。首先在对三维模型主要的线表示方法进行详细分析的基础上,给出了特征基因定义。然后对特征基因在三维空间提取算法进行了阐述。最后利用矢量化和简化处理,对特征基因进行优化。第三章：探讨了草图绘制语义、草图驱动特征基因变形及特征基因三维映射的基本方法。首先在对设计师常用草图绘制方法的归纳基础上,提出了草图绘制语义定义,并给出了语义识别过程的关键算法；其次在活动轮廓模型的基础上,针对特征基因给出了基于活动轮廓模型的特征基因变形算法；最后结合草图绘制及视觉认知的特点,提出了符合认知习惯的特征基因三维映射方法。第四章：针对不同草图绘制语义给出了相应的曲面变形算法。首先对具有曲面局部特征保持性质的拉普拉斯变形算法进行了阐述,并在此基础上分别针对修改、添加和阴影绘制等草图语义,分别实现了基于特征基因线条变动、添加和阴影效果的曲面变形方法,实现曲面造型。第五章：介绍了利用本文方法实现的三维造型CAD系统的基本功能,并给出了相应的产品造型实例。第六章：全文的总结和展望,对本文的主要研究内容和创新点进行总结,并指出了目前存在的主要问题及其改进思路。
[Abstract]:The animation, toy and film industries are an important part of the cultural and creative industries and are in a period of rapid development. However, with the gradual improvement of the level of development, our country is deficient in product innovation design. It has become the main bottleneck restricting the development of these industries. Combined with the national 863 project "flexible complex product rapid creative digital design method research and its application" 2009AA04Z103U, this paper has carried on the thorough research to the product innovation design important component-three-dimensional modelling design. Product 3D modeling is playing a more and more important role in product innovation design because of its full expression ability of geometric shape. However, the existing 3D modeling software is complex in operation and can not support sketching well, which limits the product design ability of enterprises. In this paper, a 3D modeling method using feature gene to express 3D model geometry feature and modify feature gene by sketch semantics is proposed to realize 3D modeling. The full text is divided into the following six chapters: The first chapter summarizes the current situation of animation, toy and film industry in China, expounds the current situation of product design and the existing problems, and introduces the research situation of related fields at home and abroad. From this, the research contents and research ideas of this paper are given. Chapter 2: the definition, extraction and optimization of characteristic gene are given. Firstly, based on the detailed analysis of the main line representation methods of 3D model, the definition of characteristic gene is given. Then, the algorithm of feature gene extraction in three-dimensional space is described. Finally, the characteristic gene was optimized by vectorization and simplification. Chapter 3: the basic methods of sketch drawing semantics, sketch driving feature gene deformation and feature gene 3D mapping are discussed. First of all, based on the induction of common sketch drawing methods, the semantic definition of sketch drawing is proposed, and the key algorithm of semantic recognition is given. Secondly, on the basis of active contour model, An algorithm of feature gene deformation based on active contour model is presented for feature genes. Finally, combining the characteristics of sketch drawing and visual cognition, a new method of feature gene mapping is proposed, which accords with cognitive habits. Chapter 4: the corresponding surface deformation algorithm is given for different sketch semantics. First of all, the Laplace deformation algorithm with the property of preserving the local feature of the surface is described, and on this basis, the line changes based on the feature gene are realized respectively for the sketch semantics such as modification, addition and shadow rendering. Add and shadow effect of surface deformation method to achieve surface modeling. Chapter 5: the basic functions of 3D modeling CAD system realized by this method are introduced, and the corresponding product modeling examples are given. Chapter VI: the summary and prospect of the full text, the main research content and innovation of this paper are summarized, and pointed out the existing main problems and their improvement ideas.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP391.72

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