Golf swing classification method, classification system, classification apparatus, and non-transitory computer-readable storage medium with program recorded thereon

Abstract

The method according to the present invention includes a step of dividing a golfer's golf swing into three golf swing trajectories, namely a backswing, downswing, and follow through, and allocating each golf swing trajectory to a 2D coordinate system formed by a horizontal axis and a vertical axis with a given point among the golf swing trajectories as the origin; a step of establishing, for each of the three golf swing trajectories, a line connecting the origin and a point selected in the golf swing trajectory and calculating an angle enclosed between each established line and the horizontal axis; and a step of calculating an angular difference between any two angles among the calculated angles, plotting the angular difference on a 2D map, and classifying the golf swing.

1 . A method for classifying a golf swing of a golfer hitting a golf ball with a golf club, comprising the steps of:
 (a) dividing the golfer's golf swing into three golf swing trajectories and allocating each golf swing trajectory to a 2D coordinate system formed by a horizontal axis and a vertical axis with a given point among the golf swing trajectories as an origin, the golf swing trajectories being a backswing, a downswing, and a follow through;   (b) establishing, for each of the three golf swing trajectories, a line connecting the origin and a point selected in the golf swing trajectory and calculating an angle enclosed between each established line and the horizontal axis; and   (c) calculating an angular difference between any two angles among the calculated angles, plotting the calculated angular difference on a 2D map, and classifying the golf swing based on the 2D map.   
     
     
         2 . The method according to  claim 1 , wherein in step (c), the angular difference between the angle for the backswing and the angle for the downswing and the angular difference between the angle for the follow through and the angle for the downswing are plotted on the 2D map, and the golf swing is classified based on the 2D map. 
     
     
         3 . A system for classifying a golf swing of a golfer hitting a golf ball with a golf club, comprising:
 a camera configured to capture an image of the golfer's golf swing; and   a classification apparatus configured to analyze and classify the captured golf swing, wherein   the classification apparatus comprises:   a measurement unit configured to divide the golfer's golf swing into three golf swing trajectories and to allocate each golf swing trajectory to a 2D coordinate system formed by a horizontal axis and a vertical axis with a given point among the golf swing trajectories as an origin, the golf swing trajectories being a backswing, a downswing, and a follow through;   a feature extraction unit configured to establish, for each of the three golf swing trajectories, a line connecting the origin and a point selected in the golf swing trajectory and to calculate an angle enclosed between each established line and the horizontal axis; and   a classification unit configured to calculate an angular difference between any two angles among the calculated angles, to plot the calculated angular difference on a 2D map, and to classify the golf swing based on the 2D map.   
     
     
         4 . An apparatus for analyzing and classifying a golf swing of a golfer hitting a golf ball with a golf club, comprising:
 a measurement unit configured to divide the golfer's golf swing into three golf swing trajectories and to allocate each golf swing trajectory to a 2D coordinate system formed by a horizontal axis and a vertical axis with a given point among the golf swing trajectories as an origin, the golf swing trajectories being a backswing, a downswing, and a follow through;   a feature extraction unit configured to establish, for each of the three golf swing trajectories, a line connecting the origin and a point selected in the golf swing trajectory and to calculate an angle enclosed between each established line and the horizontal axis; and   a classification unit configured to calculate an angular difference between any two angles among the calculated angles, to plot the calculated angular difference on a 2D map, and to classify the golf swing based on the 2D map.   
     
     
         5 . A non-transitory computer-readable storage medium having recorded thereon a program for causing a computer, constituting a classification apparatus for analyzing and classifying a golf swing of a golfer hitting a golf ball with a golf club, to perform the steps of:
 (a) dividing the golfer's golf swing into three golf swing trajectories and allocating each golf swing trajectory to a 2D coordinate system formed by a horizontal axis and a vertical axis with a given point among the golf swing trajectories as an origin, the golf swing trajectories being a backswing, a downswing, and a follow through;   (b) establishing, for each of the three golf swing trajectories, a line connecting the origin and a point selected in the golf swing trajectory and calculating an angle enclosed between each established line and the horizontal axis; and   (c) calculating an angular difference between any two angles among the calculated angles, plotting the calculated angular difference on a 2D map, and classifying the golf swing based on the 2D map.