Development Of 3D Modeling System For Individualized Human Body

The method of 3D human body modeling is very important in the 3D garment computer aided design system. And the mannequin modeling will influence the complexity and performance of garment design directly, and also be closely related with the three-dimensional simulation of the mannequin, and the shift from two-dimension to three-dimension of the garment pieces. Therefore exploring 3D-garment modeling method is of extensive value in research and prospect for application. Highly individualized, the artificial results of three-dimensional and good computer interface are becoming the trendency and characters of three-dimensional garment CAD system, which are arousing great concern from the worldwide research institutes. In this thesis, the design method for 3D modeling system of system is proposed and the system is developed. The following achievements are gained.The method of acquiring the three-dimension human data is discussed firstly. The comparison between the traditional contact measurement and the three-dimension body measurement has been conducted. According to the needs of individual three-dimension human-form modeling, the improved measurement method is suggested, in which the traditional contact measurement method of mannequin and the measurement of human additional characteristic, such as the thickness and width, interval of breast, breasts' highth, buttocks high and so on, are combined. By this combination, mannequin modeling can be brought forthpreciously and conveniently, and a feature—based parametric mannequin modeling method is presented.The advantages and shortcomings of several kinds of human modeling method are analyzed before establishing the concrete scheme, Then with use of project graphic study software MATLAB and existing three-dimensional modeling software UG, meanwhile, human body modeling is realized. Based on these, NURBS curved surface modeling method is put forward which is under VC ++ development environments and OpenGL three-dimensional figure software contractors. Utilizing the measurement data of free-formed surfaces, a free-formed human body surface is constructed with the method of NURBS. Additionally, a utility construction system is developed, which is mainly composed of 3-D human body measurement, parameters inputting, interaction modification and modeling graphics simulation.A standard three-dimensional dummy is set up in the system, and user may regulate own characteristic parameter to realize a feature-based parametric mannequin modeling. Thus, the individualized dummy developed provids convenience for the designer and customer.A friendly mutual interface for the human model system is designed. One's own dummy can be getten by inputting own characteristic parameters, such as perimeter of the bust, waistline, the buttocks, breast height and etc, which is convenient for modeling rapidly and accurately. Therefore, good foundations are settled for developing the garment modeling and pattern design later. In additional, the individualized modeling becomes an important part in developing the computer aided 3D-garment design system.