Research On Virtual Human Modeling Technology Based On Chinese Anthropometry Data

With the rapid development of the virtual reality technology and computer animation, as the embodiment of the user in the virtual space, virtual human has drawn wide attention among people, and we can see it in virtual fitting, QQ3D show, virtual training and human-computer ergonomics analysis software (e.g., Jack, Ramsis). As an important part of virtual human technology, virtual human modeling mainly solves the problem of how to make digital representation of geometrical characteristics of the human body effectively. Existing methods get some lifelike virtual human models mainly through the data from human anatomy sections, images, video sequences and3d scanners. But the obtained models contain a lot of redundant information, which is not good for real-time motion control and applications. Therefore, how to use the data points as less as possible to construct a realistic3d virtual human model which can be used for real-time motion editing and controlling is the key of this thesis.The purpose of this thesis is to drive the skin mesh movement by the bottom bone joint model, and form the realistic and natural virtual human animation. To achieve this goal, a3d virtual human modeling solution which is based on Chinese anthropometry data is put forward in this thesis. First of all, we select19man characteristics data as the standard data of virtual human modeling by analyzing the GB10000-88anthropometry data. Secondly, virtual human skin mesh model is constructed by topological modeling in3ds Max software. Thirdly, by analyzing the hierarchical human body joints, a joint chain structure is set up. Combining the geometry hierarchical modeling method with joint motion constraints, we construct a joint movement model which can be real-time edited and controlled. Finally, by a combination of the joints and skin data matching, the influence of joints, weight calculation and quaternion spherical interpolation technology, the dynamic joint model and static skin mesh are integrated to a two-layer virtual human model. The experimental results show that the constructed model which has Chinese anthropometry data characteristics, not only has relatively vivid appearance, but also can realize real-time virtual human movements and deformations of the skin. The outcomes also prove the rationality, effectiveness and controllability of the proposed scheme, which is conducive to modeling of virtual human role, skin deformation and real-time motion simulation.