Diagnosing method of golf swing

Abstract

A diagnosing method of a golf swing according to the present invention includes the following steps: (x) a camera photographing a golf player swinging a golf club to hit a golf ball and the golf club to obtain a plurality of frames for determining a shaft position; (y) a calculating part subjecting a check frame for judging the shaft position and the other frame to difference processing and binary processing using the plurality of frames, to obtain a binarized difference image; and (z) the calculating part subjecting the difference image or a corrected image thereof to Hough transform processing to attempt to extract the shaft position.

What is claimed is: 
     
         1 . A diagnosing method of a golf swing comprising the steps of:
 a camera photographing a golf player swinging a golf club to hit a golf ball and the golf club to obtain a plurality of frames for determining a shaft position;   a calculating part subjecting a check frame for judging the shaft position and the other frame to difference processing and binary processing using the plurality of frames, to obtain a binarized difference image; and   the calculating part subjecting the difference image or a corrected image of the difference image to Hough transform processing to attempt to extract the shaft position.   
     
     
         2 . The method according to  claim 1 , further comprising the following step (Sa) and/or step (Sb):
 (Sa) the step of judging quality of a posture of the golf player according to whether the shaft position of the check frame is extracted or not in the step of attempting to extract the shaft position; and   (Sb) the step of judging the quality of the posture of the golf player according to the shaft position when the shaft position of the check frame is extracted in the step of attempting to extract the shaft position.   
     
     
         3 . The method according to  claim 1 , wherein the check frame is a frame of a top. 
     
     
         4 . The method according to  claim 1 , wherein the check frame is a frame of a finish. 
     
     
         5 . A diagnosing method of a golf swing comprising the steps of:
 a camera photographing a golf player swinging a golf club to hit a golf ball and the golf club to obtain a plurality of frames for determining a shaft position;   a calculating part extracting a plurality of predetermined frames from the plurality of frames;   the calculating part performing difference processing and binary processing using the plurality of predetermined frames to obtain a plurality of binarized difference images;   the calculating part subjecting the plurality of difference images to AND processing to obtain an AND image for extracting the shaft position;   the calculating part determining a shaft searching region using the AND image; and   the calculating part subjecting the plurality of AND images or corrected images of the AND images to Hough transform processing to attempt to time-sequentially extract the shaft position.   
     
     
         6 . The method according to  claim 5 , further comprising the steps of:
 the calculating part subjecting the difference image and/or the AND image to contraction processing and expansion processing to obtain a mask image; and   the calculating part subjecting the AND image and the mask image to difference processing to obtain a masked difference image,   wherein the corrected image is the masked difference image.   
     
     
         7 . The method according to  claim 5 , wherein an extraction result of a shaft position of a check frame and an extraction result of a shaft position before the check frame are obtained as a result of the time-sequential extraction; and
 advisability of extraction of the shaft position in the check frame is judged according to whether the shaft position before the check frame is extracted or not when the shaft position of the check frame cannot be extracted.   
     
     
         8 . The method according to  claim 7 , wherein the check frame is a frame of a top or a frame of a finish. 
     
     
         9 . A diagnosing system of a golf swing comprising:
 (A) a camera photographing a golf player swinging a golf club to hit a golf ball and the golf club;   (B) a memory storing photographed image data; and   (C) a calculating part, wherein the calculating part comprising:   (C1) a function for extracting a plurality of predetermined frames from the image data;   (C2) a function for performing difference processing and binary processing using the plurality of predetermined frames to obtain a plurality of binarized difference images;   (C3) a function for subjecting the plurality of difference images to AND processing to obtain an AND image for extracting a shaft position;   (C4) a function for determining a shaft searching region using the AND image; and   (C5) a function for subjecting the plurality of AND images or corrected images of the AND images to Hough transform processing to attempt to time-sequentially extract the shaft position.