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METHOD OF MEASURING ROTATIONAL MOTION OF A GOLF BALL

  • US 20020022531A1
  • Filed: 06/14/1999
  • Published: 02/21/2002
  • Est. Priority Date: 06/30/1998
  • Status: Active Grant
First Claim
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1. A method of measuring rotational motion of a golf ball in which a hit golf ball is photographed by use of two cameras disposed along the traveling direction of the golf ball with a predetermined distance therebetween, and the rotational motion of the golf ball is measured based on the photographed images of the golf ball, said method comprising the steps of:

  • providing a golf ball having a no-depression polygonal mark in black or a dark color close to black printed on the surface of the golf ball;

    hitting a golf ball;

    photographing the hit golf ball by use of two cameras;

    detecting the position of an angular point of the no-depression polygonal mark from photographed images, by means of image processing; and

    calculating the rotational motion of the hit golf ball based on change in position of the angular point in images photographed by the two cameras.

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