Parametric Human Body Three-dimensional Motion Reconstruction Subsystem In Sports Video Analysis System

With the popularization of sports and the rapid development of smartphones,it is an important direction of physical education to standardize the motion and scientific guidance of sports participants through sports videos.Transforming the motion video into the 3D(three-dimensional)human body model can realize the calculation and analysis of the energy conversion related to the exercise,thus providing scientific guidance.The human body 3D modeling algorithm is an important foundation for the realization of the method.At the same time,human 3D modeling algorithm can also be widely used in movie games,virtual reality,3D dressing and other fields.In this thesis,parametric human body motion 3D modeling based on point cloud is used to design and implement a parametric human motion 3D reconstruction subsystem for 3D modeling and motion reconstruction of the human body in the motion video analysis system.The system can build the parametric human body 3D model according to the basic human body parameters such as height and weight,construct a human body 3D model database,and can realize the feature of three-dimensional motion reconstruction in the motion video analysis system by the motion data.This thesis first introduces the research background and significance of the subject and compares the related methods of basic human body 3D modeling.It describes the demand analysis of the parametric human body 3D motion reconstruction subsystem.Based on the demand analysis,a parametric and drivable human body 3D modeling algorithm is researched and proposed.Then the overall design of parametric human body 3D motion reconstruction subsystem based on this algorithm is introduced,including system architecture and process design,the basic data structure design,interfaces design and modules design of the system based on the algorithm.Based on the design,data analysis,parametric modeling,motion reduction and other modules in the system is designed and implemented in detail.The main modules of parameterized human body 3D motion reduction subsystem are tested.It analyzes the parameterized human body 3D models realized by the method based on solid modeling and surface modeling,which verify that the system supports different model representations and the system is extensible.Finally,the paper summarizes the two aspects of the algorithm and system work,and prospects for the next step.