| With the rapid development of computer information technology and extensive apply of network, the traditional CAD has remarkably changed into a new subject. The development of CAD application program based on internet and database faced to the network ,both of these are related concept and content of web-based CAD. Web-based CAD , database and data-compression are applied to the thesis. The thesis comprehensively gives a necktie pattern CAD system based on the internet.According to the requirement of alternately necktie design .A C/S system structure is put forward and a pattern of network is set up. The necktie pattern CAD system stands out because of three important features. First: the apply of network. Customer can implement an easy-operating color-matching to help pattern design. Using the pattern recognition and knowledge of clay modeling, the system make sure whether to choose the pattern. Also we can communicate with expert whether to improve the pattern of color-matching .Customer can change their private information at any moment and submit the information to the server. Server can update the changed information in time. Customers can not only commute with the server but also with the other customer. All of these are the features of network-mutual design system.Second: the apply of Database, on the thesis. Database automatically manage the information of the client effectively, all of the files are stored by the prescribed format. Also the basic information of the client is automatically updated and managed. The database can manage the login of the client, the storage of the information of the client and the right of manipulation.Finally: data-compression in the network transmission .We can get good compression rate in the period of compression of the pattern design to improve the bottle-neck of the network. We distill the point of organization and set it down in allusion to the particularity of the neck-tie design. By doing this we can aim at thecompression.The technology above provides an effective way to a real neck-tie design mutual system . In doing this we can shorten the cycle of the product, depress the cost of the product, improve the pace of the company. The server is responsible for the authentication of clients, the storage of the resource , the operation of the database, intercommunion with pattern or text information. Data-compression technology gives convenience to the management and transmission of the resource. By doing this human and material resource are all economized. All accord with the competition of the fewness investment and good result. A real neck-tie design mutual system is implemented. |
