Athletes Motion Capturing And Analysis System

Now many of the sports teams and sports schools want to be able to find a better way to improve the teaching effect of the coaches and athletes professional technology level,the track of the daily technical training athletes,so that the coach after training or after the game on the performance and technical specification of movement level playback and interpretation.When coaches give guidance to athletes,athletes can see their own performance more directly and provide reference for future training improvement.Coaches can also make relevant training plans according to the comparison of video data.I participated in project requirement investigation,system requirement decomposition,system architecture design and database design.Mainly responsible for Web front-end development,local video back-end development,remote function calculation back-end development and data visualization design,implementation and reconstruction,participated in algorithm training set annotation and effect testing.The main work of this paper includes: In reality sports teams of players,coaches and sports scientific research personnel interview and field survey in the venues and ground reference and analysis,the athlete video monitoring and analysis of the main business process can be divided into seven steps,the user configuration,video recording,video playback,video contrast,dot quantitative pretreatment,repair and quantitative analysis.User profiles contain the relevant business requirements for configuration information.Including team setting,site setting,project setting,camera configuration and so on.Video playback includes playback list,select records for viewing,bookmarking,deleting,etc.,switch video perspectives,control the synchronous playback of videos from multiple perspectives,and draw and mark videos from the main perspective.The video comparison can separate or superimpose the movement state of the athletes,and make training and improvement plans according to the comparison results,so as to improve the training quality and the average skill level of the athletes.Quantization preprocessing configuring the parameters and regions of the video in the records to be quantized,and then adding them to the quantization queue of the system.The dot-fix function adjusts and repairs the array data of 2D nodes after the Openpose mark.In quantitative analysis,the internal and external parameters of the camera were calculated by Zhang Zhengyou calibration method,and the 3Dreconstruction was carried out by combining with the node markers of the figures of Openpose.According to the generated three-dimensional data,the specific numerical changes are calculated and shown in the form of charts.The superposition display of video and two-dimensional trajectory can more intuitively see the movement changes of the characters in the camera perspective.Through 3D animation observation of the movement of athletes in each frame and the movement track of each node,more comprehensive observation and analysis of the movement changes of athletes.The data export function of the system can export the analysis data into Excel and JSON files,which can provide specific quantitative data reference for athletes,coaches,sports science researchers and system service personnel.The system completed in the paper has been used in some sports teams in Beijing,Shandong and Sichuan.After the actual deployment and use of the system,athletes and coaches responded well,and at the same time,they found the further needs of users and the room for improvement of the system.