Swing Posture Analysis For Golf Virtual System

In this paper,we developed the swing posture analysis module which can be applied in virtual golf training.Swing motion Joint data obtained by Kinect and apply to Golf Swing training aiding system.Motion capture base on Kinect make it easy to process the joint data,real-time,cheaper,maker-lesss.Our objects come from Guangdong Vocational Institute of Sport who major in Golf.We studied the swing posture of ten high-level golf players.First of all,this study adopts the interview method and observation method to carry on the investigation to the golf swing motion.Interviews for golf professional students,coaches,observation users for golf beginners.Based on the observation method,we took photos and video for observing the golf beginner swing motion.We classified the error type of golf swing motion through analyzing the golf beginner swing motion.We establish the golf swing assessing factors base on Kinect.The evaluation index includes: the position of the grip point,the four characteristics of the posture angle,the rhythm of the swing,the speed of the ball,the inclination of the spine,the position of the left and right foot,and the joint angle.Secondly,in this study,through the analysis of the whole swing motion,the golf swing causes the body to twist,limb self-occlusion,which leads to Kinect capture data deviation problem.Four characteristic joint angle sequences are proposed to evaluate the whole swing motion.Angle deviation leads to evaluation failure.In order to reduce the problem of data deviation caused by self-occlusion of the limbs,this paper carries out Kinect golf swing observation node analysis experiment,analyzes eight swing directions,each swing directions includes the setup motion,the top position of up swing,hitting motion,finish swing motion of the joint point tracking status data.Swing directions 8 receive the highest joint tracking rate of 13.51%,while swing direc-tions 5 receives the lowest joint tracking rate of 11.92%.Finally,we developed a golf swing posture analysis module that can be used for virtual golf training systems.In order to analyze the user's swing action intuitively,a three-dimensional swing action analysis module based on Unity was developed as a sub-module of the user's attitude analysis module of the virtual golf training system.Based on the swing rhythm,swing plane,spine angle,shoulder joint assisted training,joint trajectory and joint angle training method,the user attitude analysis module is quantitatively evaluated and the validity of the training method proposed by this study is verified.