Dissertation > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Computer simulation

Research and Implement on the Behavior Database of Virtual Hand

Author XuChao
Tutor CaiXuanPing
School National University of Defense Science and Technology
Course Information and Communication Engineering
Keywords Virtual Reality Virtual hand 3DS Max modeling OpenGL Motion constraints of manpower Behavior database
CLC TP391.9
Type Master's thesis
Year 2011
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Natural and efficient human-computer interaction is one of the goals of virtual reality technology to the development of the virtual hand technology is an important means to achieve this goal, the field of human-computer interaction research hotspot. With the virtual hand technology continues to evolve, more and more people on the realism of the virtual hand interaction system and real-time requirements. For remote display of the virtual hand with stability control and real-time problem of poor behavior of the virtual hand database research and design to achieve in the future to improve the virtual hand remote display provides good stability and control with real-time foundation. Work and innovation of the main points are as follows: 1. Detailed analysis of kinematics law of manpower. Bone structure and staffing joint motion characteristics as the starting point, and mathematical models of staffing levels, and the combination of the homogeneous transformation relations between the space coordinates, derived kinematic equations of manpower and motion constraints of manpower , provides theoretical support for the establishment and control for the next step of the virtual hand model. 2. Taken the the block draw and manpower skin texture mapping method to establish a highly realistic virtual hand model. OpenGL and 3DS Max software first comparative analysis of the respective strengths and weaknesses, and then using 3DS Max software modeling and model control taken the chunked drawn staffing rapid modeling and virtual hand model display with OpenGL programming and control, and finally Unwrap UVW modifier and Photoshop to achieve the the real manpower skin texture mapping virtual hand model. This method is effective to improve the virtual hand modeling efficiency and optimize the display of the model, and laid the foundation for the establishment of virtual hand behavior database. . Based the manual motion constraints gestures library automatically establish and use of the database of the behavior of the virtual hand. First studied the behavior of the database in the remote display and control of the virtual hand, then SQL Server 2000 database development platform automatically be programmed storage parameters of the virtual hand gestures, manpower joint motion constraints excluded automatically building a database unreasonable gestures, thus completing the establishment of a database on the behavior of the virtual hand, and for this method is proposed in this paper a new motion constraints of manpower. The experimental results show that by adding manpower motion constraints may reduce the amount of the behavior of the database storage for the original 1.43%, greatly reducing the behavioral database redundancy and improve the rate of behavioral database query. Finally, the use of a separate building a database and points table method to further improve the behavior of database query performance, and provide a foundation for behavior database in the remote display and control of the virtual hand. 4 experiments to verify the behavior database stored in the part of the gesture parameters. First, using stereo vision based method to extract the key points of manpower movement angle, by virtual hand interface program reads and displays the angle corresponding virtual gestures, then with manpower actual movement gesture and behavior database The query of the gesture, and finally analysis of the presence of error in the experiment.

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