| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a ball delivery system.SOLUTION: This invention generally relates to a ball delivery system and method. To be concrete, the ball delivery system is capable of varying the direction of a rotating axis of a ball delivered from the ball delivery system from the vertical state to the direction of motion of the ball to the parallel state to the direction of motion. The information on the speed and the rotation axis of the ball cab be input. The information related to the rotating speed and the rotation axis of the ball can be determined from a video image of the ball.</p> |
