抄録
In baseball games, the most annoying problem for both players and audience is that the umpires sometimes make mistakes in their judges. We pay attention to a simulator system which can be used for educating and training those who want to be an umpire-in-chief. Constructing a simulator system consisted of a screen projection system and a computer, we conducted some experiments with the cooperation of some testees. In this paper we report our experimental results.
