Research & Implementation Of The System For Computer Aided Innovative Fabric Design And Manufacture

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.