Abstract
Relative to the measurement of a three-dimensional orientation of golf club head with one camera even if markers are put on any positions, we developed a jig which makes it possible to set a golf club at an intended standard orientation and a plurality of intended orientations quickle. The investigated setting errors of the jig were not larger than 0.1°. And, also, it is confirmed using this jig, it because possible to measure a head orientation relative to the intended standard orientation. Additionally, the following results are obtained. (1) The measurement error can be decreased by increasing the number of the head orientations considering the shaft angle change, but not decreased by increasing those considering the face angle change. (2) In case of setting considering the face angle change only, changing face angle with not 0° shaft angle makes the measurement error to be less than with 0° shaft angle.
