Virtual Human Modeling And 3D Motion Reconstruction By Joint Data

Virtual Reality is a new field of contemporary science and technology. It plays an important role in the field of military, medical, industrial and etc. With the development of computer technology, image processing and 3D vision, the virtual reality technology has become a symbol which can evaluate the level of science and industry of one country. Virtual reality provides opportunities for folks to experience a variety of hard tasks. Virtual human is a technology branch of virtual reality can emulate the human body to do a variety of perilous experiment. In space, energy and other perilous industry, we can accomplish the training work of perilous task through the virtual human. It not only improves the work efficiency and safety, but also makes thorough preparations for any risks. Therefore, the research of studying 3D modeling of virtual human and motion reconstruction has sufficient theoretical significance and practical value.This paper proposes a method of modeling virtual human and uses it for reconstructing 3D motion with joint data. This method uses Maya to design the virtual human model. In view of the virtual human’s complexity of skin characteristics and nonlinear problem of joint motion, this paper proposes a hybrid modeling method which combines the joint model and the skin model to help reconstructing the virtual human’s motion. This method completes the design of the axial direction and hierarchical relationship of joints in the process of modeling joint. It also completes the grid design in the process of modeling skin. Then it changes the sensitivity of the nearby skin to bone by modifying skin weight. By using Unity3D, this paper achieves importing the virtual human and scene model. This paper accomplished key-frame, displacement, rotation and interpolation algorithm of virtual human and imported the joint data to reconstruct 3D motion.The experiment results demonstrated that the virtual human based on the complex of skin and joint model can reduce model complexity and processing data size and enhance the efficiency of controlling motion. The virtual human realized by Unity3D has favorable performance of 3D motion reconstructing and can achieve fluid joint displacement and rotation through real joint data under forward kinematics.