Implementation of an impact position display system of golf ball using an image processing in an indoor golf course

Recently, the people are commenced to learn how to play golf in an indoor golf course. The most difficult thing for beginners is the head-up that is frequently caused during their golf swing. Once the people hit their golf ball, they are wondering where it goes instinctively. Thus, they learn the wrong swing form that lift up their head. This paper presents the impact position display system to prevent this head-up when the beginners play the golf. The proposed approach uses a general web camera to shoot golf screen in an indoor golf course in real time. The captured video file is divided into the frame and each frame is divided into 16 blocks. We detect the changing motion block by calculating the variance of brightness of every block. Then, we estimate the impact positions in central, upper-left, upper-right, bottom left, bottom right, and display them on the screen using beam projector. The experimental results are obtained from separate experiments using iron and driver. The accuracy of the experiment is about 86%, 75%, and 60% for the central region, lower zone, and upper zone, respectively. Accuracy of this result significantly relies on the lighting effect. However, the proposed approach is good enough to use for the indoor screen golf course having limited lighting source. It can be useful to fix the bad habit that lifts up the head during the golf swing.