【作者】 马凌洲；

【导师】 陈纯；

【作者基本信息】 浙江大学 ， 计算机应用技术， 2005， 博士

【摘要】 织物面料的设计是纺织产品设计工作的核心内容,织物CAD/CAM系统已经在织物的设计与生产中得到了广泛的应用,但随着人民生活水平的提高,市场上对织物面料生产提出了“批量小、质量高、交货快”等新要求,因此对织物CAD/CAM系统也提出了更高的创新设计要求。 创新设计技术,主要包括产品创新设计、降低成本设计、快速设计、仿真与虚拟设计、智能设计、广义优化设计等设计技术。织物设计快速响应对织物CAD系统提出了新的要求,包括图案创新设计、织物性能设计、纱线及织物外观模拟、应用效果展示等等。 本文就是基于创新设计技术的理论与内容,结合织物设计快速响应的目标与要求,在若干织物创新设计的关键技术方面进行研究与探索,并以此为基础实现了一个织物创新设计系统——TOP2004系统。论文的具体内容如下: 简单地介绍与回顾了当前织物CAD系统的现状,分析了现有的织物CAD系统的优点和所存在不足,根据创新设计方法的基本原理及其主要内容,结合织物设计快速响应的要求,提出了织物创新设计中的若干关键技术。 介绍了织物组织的参数化设计方法,对多种不同类型的织物组织提出各自的数学模型,对织物组织自动化生成的算法进行了系统分析;研究了像景织物的创新设计技术,在系统中增加了针对像景织物的设计工具与方法。提出基于基原色分色与专色分色相结合的分色方法,提高像景织物的色彩表现力;并对像景织物的边缘轮廓进行特殊处理,使得像景织物的最终效果更加的形象逼真,色彩饱满。 研究了织物图案的自动描稿技术,介绍了图案自动描稿的功能要求,提出自动描稿功能模块的划分,着重提出并实现了一种基于MSEL的图案自动描稿算法。MSEL的边缘检测算法,有很好的边缘连续性,边界单象素点宽度,以及较小的错误率,所以具有较好的实用性。 研究了织物表面外观模拟技术,提出了一种简易的基于三亮度色纱模型的织物表面外观模拟方法。在该模型中,纱线的颜色、以及纱线的捻纹、明暗变化,是用三种不同亮度的颜色来体现的,模拟效果图打印稿能够满足人们的肉眼要求,而且模拟速度快,计算量不大。从而提高了系统效率,增强了织物CAD系统的实用性能。另外,本文还尝试以三维的方式去模拟织物纱线,考虑纱线在织物中的排列与走向,最终生成外观模拟效果图。这种方法更能够体现织物中的纱线交织结构。 研究了织物场景模拟的相关原理,并提出了一个基于网格模型的面料二维场景模拟方法。相对于三维模型的纹理映射,该方法在实现上相对比较简单,算法效率高,而且得到的效果逼真,具有广泛的应用前景。 设计并实现了一个织物创新设计系统TOP2004。该系统中包括了图案数据库子系统、图案创作及色彩处理子系统、织物组织设计处理子系统、织物工艺设计处理子系统、织物输出处理子系统、织物表面外观模拟子系统及织物场景模拟子系统,并成功地验证了前述的若干关键技术,在纺织行业中得到了推广应用,取得了巨大的经济效益和社会效益。更多还原

【Abstract】 The fabric design is the core component of the textile products design. The textile CAD/CAM system have been applied widely, but as the level of our consume is boosting continuously, new requests such as "small quantity, high quality and delivering the goods quickly" are proposed to the production of fabrics, and more requests for innovation are also proposed to textile CAD/CAM system.Innovative design techniques mainly consist of product innovative design, design with low cast, quick design, simulation and virtual design, intelligent design, optimized design in general. More are required by quick response of fabric design, such as innovative design of patterns, capability design of fabrics, simulation of yarn and fabric appearance, and exhibition of fabric scene, etc.Base on the principles and contents of innovative design techniques, and considering the requests of quick response of fabric design, we research on some key techniques of fabric innovative design, and based on them a textile innovative design system called Top2004 has been developed. The details of this thesis are as follows:First we survey the current textile CAD systems briefly, and analyze the merits and faults of them. According to the basic principles and main contents of innovative design techniques and considering of the requests for quick response of fabric design, we propose the core techniques of textile innovative design.We describe the parametric design method of fabric weaves, propose different mathematic models for different kinds of fabric weaves, and analyze the algorithms for generating the fabric weaves automatically. We research into the innovative design technique for woven photo-graphics, add the design methods and tools facing the woven photo-graphics. We present the new color separation method combining single-color separation with elementary based separation, in order to improve the colorful expressive force of the woven photo-graphics. Also we make special modification for the photo-graphics’ edges, to enhance the resulting effect with realistic visualization.We research into the technology of automatic pattern painting, describe the functional requirement for the automatic pattern painting system, and give out its functional modules. We propose a new automatic pattern painting algorithm based on MSEL and implement it. The edge detection algorithm using MSEL, results in continuous, one-pixel edges, and fewer errors. Consequently, it performs well and is easy for use.We research into the technique of appearance simulation for the fabric surfaces, and present a method to simulate the fabric’s surface appearance based on a model of "3-level luminance colorful thread". With this model, the threads are presented by three different luminance colors. The simulating results can satisfy human’s eyes fairly well. Due to the small calculation, this algorithm is efficient. Therefore, it’s effective, and helpful to enhance the performance of fabric CAD system. Also we try to simulate the 3D threads and fabrics. Finally we produce the resulting images, considering the arrangements and trends of the threads in the weaving structure. In this way, we can easily figure out the weaving structure in the fabrics for the simple weaves.We research into the principles of environmental simulation of fabrics, and present a method to simulate the realistic effect of the cloth in a 2D virtual environment based on mesh model. Compared with 3D texture mapping, our method is more intuitive and efficient. As quite impressive simulation result couldbe generated with it, our method will be applied widely in the future.We also design and develop a fabric innovative design system named Top2004, which consists of Pattern database subsystem, Pattern design and image processing subsystem. Weave design subsystem, Fabric craft processing subsystem, Fabric output subsystem, Fabric appearance simulation subsystem and Fabric environmental simulation subsystem. With this system, the core techniques proposed above have been proved to be quite flexible and effective. Our system has been applied widely and great economic and social benefits have been achieved.更多还原