Automatic high-speed flying ball detection from multi-exposure images under varying light conditions
Proceedings of the 10th International Conference on Virtual Reality Continuum and Its Applications in Industry
Measuring initial conditions for baseball pitching games
SIGGRAPH Asia 2013 Posters
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Virtual sports such as virtual golf are a sports game that is played with a real ball on a virtual environment. Most virtual sports games use a physics engine that simulates the trajectory of balls in flight with initial launch conditions, including ball speed, launch angle, spin angle and axis. Therefore, the measurement of initial launch conditions is essential for developing virtual sports games. A lot of systems based on speed sensors such as infrared LEDs have been studied for a long time. Nowadays, most commercial systems use high-cost equipment such as phased-array Doppler radars and high-speed video cameras. However, such high-cost equipment increases the system cost for developing virtual sports games. In the literature, several high-speed imaging techniques without high-cost equipment has been extensively studied for a decade. For example, multi-exposure cameras have been introduced to track the high-speed motion of a flying baseball or analyze the high-speed motion of human action. In this paper, a new high-speed multi-exposure camera is proposed to measure initial launch conditions of real golf balls for a virtual golf game without high-cost equipment.