Method for Evaluating Golf Ball Hitting Process and Golf Club

Abstract

The embodiments of the present disclosure provide a method for evaluating a golf ball hitting process and a golf club, the method for evaluating a golf ball hitting process operates on the golf club equipped with a processor and multiple types of sensors, comprising: obtaining multiple types of information collected in this hitting process, wherein the multiple types of information at least include video frame sequences, sound information and posture information; obtaining the evaluation results of the hitting process based on the multiple types of information, wherein the evaluation results of the hitting process comprise: a contact position of the ball with the club face, contact attributes of the club face with the ball and the club face with the ground, a motion trajectory of the club, and a rotation speed of the ball. The embodiments of the present disclosure can accurately measure the contact between the club head and the golf ball, and can also autonomously track and accurately measure the swing path and speed, calculate the rotation and flight trajectory of the ball, and integrate the launch analysis, the ball touch measurements, and the swing analysis.

What is claimed is: 
     
         1 . A method for evaluating a golf ball hitting process, which operates on a golf club equipped with a processor and multiple types of sensors, comprising:
 obtaining multiple types of information collected in this hitting process, wherein, the multiple types of information at least include video frame sequences, sound information and posture information;   obtaining the evaluation results of the hitting process based on the multiple types of information, wherein, the evaluation results of the hitting process comprise: a contact position of the ball with the club face, contact attributes of the club face with the ball and the club face with the ground, a motion trajectory of the club, and a rotation speed of the ball.   
     
     
         2 . The method as claimed in  claim 1 , characterized in that, the number of image acquisition sensors used to collect the video frame sequences is one, wherein, obtaining the evaluation results of the hitting process based on the multiple types of information, comprising:
 obtaining a first image of the ball in contact with the club face from the video frame sequences;   obtaining a homography matrix;   converting the first image into an on-axis perspective contact diagram by means of the homography matrix;   determining the pixel coordinate values of the contact point between the ball and the club face based on the on-axis perspective contact diagram to obtain the contact position of the ball with the club.   
     
     
         3 . The method as claimed in  claim 2 , characterized in that, determining the pixel coordinate values of the contact point between the ball and the club face based on the on-axis perspective contact diagram, comprising:
 selecting a target area on the on-axis perspective contact diagram, wherein, the target area is a contact area between the club face and the ball on the on-axis perspective contact diagram;   constructing a circular projection surface area in the vicinity of the target area of the on-axis perspective contact diagram according to the actual size and shape of the ball;   taking a center position of the circular projection surface area as the contact position of the ball with the club face.   
     
     
         4 . The method as claimed in  claim 1 , characterized in that, the image acquisition sensors used to collect the video frame sequences comprise a first image acquisition sensor and a second image acquisition sensor, the first image acquisition sensor and the second image acquisition sensor are disposed on the club with a predetermined rotation angle and a predetermined spatial displacement, wherein,
 obtaining the evaluation results of the hitting process based on the multiple types of information, comprising:   obtaining a first perspective video frame sequence collected by the first image acquisition sensor;   obtaining a second perspective video frame sequence collected by the second image acquisition sensor;   obtaining three-dimensional coordinates of the contact position of the ball with the club face according to the first perspective video frame sequence and the second perspective video frame sequence.   
     
     
         5 . The method as claimed in  claim 1 , characterized in that, obtaining the evaluation results of the hitting process based on the multiple types of information, comprising:
 obtaining a deformation amount of the club in the hitting process;   determining an initial motion trajectory of the club at least based on the video frame sequences;   obtaining a target motion trajectory of the club according to the deformation amount correcting the initial motion trajectory.   
     
     
         6 . The method as claimed in  claim 5 , characterized in that, determining the initial motion trajectory of the club face at least based on the video frame sequences, comprising:
 obtaining posture information at a first time by an posture information acquisition sensor to obtain a first position and a first direction;   obtaining a club pose image shot at a time closest to the first time from the video frame sequences, and obtaining a second position and a second direction by the club pose image;   fusing the first position and the second position to obtain a target position at the first time, and fusing the first direction and the second direction to obtain a target direction at the first time, wherein, the initial motion trajectory is a motion path determined by the target positions and the target directions at multiple times.   
     
     
         7 . The method as claimed in  claim 6 , characterized in that, obtaining the evaluation results of the hitting process based on the multiple types of information, comprising:
 identifying rotation markers on corresponding ball in the video frame sequences;   estimating the rotation speed of the ball based on the rotation markers.   
     
     
         8 . The method as claimed in  claim 7 , characterized in that, the contact attributes include a contact order and a contact intensity, wherein,
 obtaining the evaluation results of the hitting process based on the multiple types of information, comprising:   determining the contact order of the club with the ball and the club with the ground according to the attribute information of the sound information, or determining the contact intensity of the club with the ground or the lawn according to the attribute information of the sound information.   
     
     
         9 . The method as claimed in  claim 7 , characterized in that, obtaining the evaluation results of the hitting process based on the multiple types of information, comprising:
 determining a time T 1  when the ball contacts the club by means of the sound information collected by a sound information acquisition sensor;   screening out a target image shot at a time closest to the time T 1  from the video frame sequences;   screening out a second image of first contact between the club and the ground from the video frame sequences;   confirming the relative shooting order of the target image and the second image in the video frame sequences so as to obtain the contact order of the club with the ball and the club with the ground.   
     
     
         10 . The method as claimed in  claim 1 , characterized in that, the video frame sequences are obtained by an event sensor. 
     
     
         11 . A data acquisition and processing device mountable to a golf club, comprising:
 an image acquisition sensor configured to collect multi-frame images in the club hitting process to obtain video frame sequences;   a posture information acquisition sensor configured to collect the posture information of the club;   a sound information acquisition sensor configured to collect the sound information in the hitting process; and,   a computing processing unit configured to perform the method as claimed in  claim 1 .   
     
     
         12 . The data acquisition and processing device as claimed in  claim 11 , characterized in that, the data acquisition and processing device further comprising an ambient light sensor configured to obtain ambient light information of a scene in which the club is located;
 wherein, an exposure parameter value of the image acquisition sensor is determined based on the ambient light information.   
     
     
         13 . A golf club, characterized in that, comprising the data acquisition and processing device as claimed in  claim 11  and a club. 
     
     
         14 . The golf club as claimed in  claim 13 , characterized in that, the posture information acquisition sensor, the sound information acquisition sensor and the computing processing unit included in the data acquisition and processing device are arranged inside the club. 
     
     
         15 . The golf club as claimed in  claim 14 , characterized in that, at least a portion of the image acquisition sensor is located inside the club. 
     
     
         16 . The golf club as claimed in  claim 15 , characterized in that, an optical portion of the image acquisition sensor is located outside the club and the remaining portion is located inside the club. 
     
     
         17 . A computer-readable storage medium, characterized in that, on which a computer program is stored, the program, when executed by a processor, implements the method claimed in  claim 1 . 
     
     
         18 . A computer program product, characterized in that, comprising a computer program, the computer program, when executed by a processor, implements the method claimed in  claim 1 .