The Three-dimensional Reconstruction Of The Human Motion Posture Based On Inertial Sensors

Effective and convenient information capture of the human motion postures plays animportant role in fields such as animation production, game development and film production.At present, there are several approaches of human motion capture and reconstruction, such asmachinery, acoustics, electromagnetism and optics. In view of the advantages anddisadvantages of the methods mentioned above, this paper explores basic solutions ofmodeling which is used in human motion capture technology, and designs a three-dimensionalhuman skeleton model based on the rigid body mechanics by using inertial sensor.According to physical structure theory and human movement science theory, an initialcalibration method of human body movement postures based on inertial sensor is proposed.The inertial sensors can be tied to human joints in any directions, and the sensorscorresponding to specific joints can be recognized by specific initialized postures. Then theinformation of human motion postures is updated by coordinate transformation of differentposture coordinate systems and depth first traversal of the tree which includes human skeletoninformation, implementing the real-time capture and trace of human motion information.The three-dimensional human skeleton model is needed for reconstructing human motionpostures in computer three-dimensional virtual scene. The Direct3D graphical interfaceoffered by Microsoft is adopted for widespread applications. The skeleton matrix informationis updated by loading skinned mesh and hierarchical information of human skeleton in orderto locate and orient each limb, implementing the three-dimensional skinned mesh animation.Wireless data transmission is used and data format is set in order to weaken restriction onhuman motion. A human posture database is designed using MySQL database, and thecollected human posture data can be stored in the database in time for research on humanaction predict and behavior recognition. Each inertial sensor transmits the collected data ofhuman motion postures to the PC through wireless signal and the host computer softwarecalculates data and drives the human body skeleton model, implementing thethree-dimensional reconstruction of human motion postures. The three-dimensional animationshows that human motion is traced in real time and the reconstruction is realistic.