Research On The Method Of 3D Parameterized Human Body Modeling In Virtual Try On System

The method of 3D human body modeling is critical to the 3D virtual try on system, and it will influence the complexity and effect of garment's simulation directly. Also now garment computer aided design system is shifting from two-dimension design to three-dimension design. Therefore studying the method 3D human body has extensive value in research and prospect for application. In this thesis, the method of parameterized 3D human body modeling is developed. The following matter is involved.First, current obtaining 3D human body surface information is discussed。According to the traits and the feasibility of 3D virtual try on system, the method of combining the traditional method of osculating measurement in costume industry with standard human body template library is put forward. In order to obtain a accurate virtual body , In except the basic parameter is provided by the client ,such as chest girth, waist girth, hip girth, stature and etc,also additional characteristic size parameter need be provided, such as the thickness and width of the chest, the distance of the breast, the height of the breast, the thickness of the hip. Then the reconstructed 3D virtual human body can be more vivid and realistic.The surface information of 3D human body must be obtained before constructing the library of virtual human body. Because of the experiment conditions, the human body model is constructed by the professional 3D character design software Poser 6.0, the data of human model is exported in 3DS file format, then according to the structure of 3ds file type, we work out a program to acquire the surface vertex information of mannequin. The format of 3DS file also is introduced simply.There were many methods for 3D human body modeling purpose, such as Line framing, curved surface, solid and physical-based modeling methods, In the thesis, because accurate geometric surface, vivid appearance and easily modified virtual human body is characteristic of the 3D virtual try on system, we use triangular face to reconstruct body surface in the development environment of VC 6.0 and OpenGL 3D graphics modeling library. The surface information of body is huge, which is exported from 3D software, and data point is scattered in the tree dimensional space, therefore, it is adverse to the deformation of mannequin and virtual try on system, also increase the computing time and complexity to get the result. So first the human body is divided into many parts based on physiologic traits, second according to the change of curvature, the useful data point is sampled, the curvature vary more quickly, the data point is sampled more, and save the sampled data point according to both body part and hierarchy. When reconstructing human body, triangular face's order is organized by the method of contour synchronous forwarding, so the smooth surface human body is reconstructed.After reconstructing a standard female mannequin, so long as users input self characteristic size parameters in this system, such as chest girth, waist girth, hip girth and so on, a individualized human body model is viewed. The developed system is convenient for modeling, by which human model is constructed accurately and quickly, users can rotate the virtual model and view it. Based on the information of human body, the corresponding skeleton is created, the mannequin can animated simply under skeleton driven. Therefore, good foundation is settled for developing dynamic dressing clothes later.