A-14 Measurement of Three-Dimensional Postures of Golf Club Head through One Set of Camera : Measuring method with markers applied to any positions of club head

Abstract

We developed a method to calculate the coordinates of markers on the club head through one set of camera. This method is enabled by setting the club head at some known postures and taking the photos of each posture. So we could measure the three-dimensional postures of the golf club head with markers applied to any positions of the club head with a camera. Following points are made in terms of the measurement accuracy. (1)The measurement error can be decreased by increasing the number of rotation axis which we rotate the club head around. (2)The measurement error can be decreased by increasing the number of the postures we set. (3)The measurement accuracy of the current method is lowered comparing to the three-dimensional measurement machine measuring the coordinates of markers.