| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine having a motion sensor which can detect that a prescribed motion has been performed even when a part of an object to be detected hardly moves while the prescribed motion of the object is being performed.SOLUTION: A game machine 100 has: an imaging part 102 for generating an image which includes a prescribed range on a front face of a game machine body 101; a motion sensor 103 for detecting a prescribed motion of an object to be detected that is positioned within the prescribed range, on the basis of the image; and a control unit 110 for determining a performance content in accordance with timing with which the motion has been detected. The motion sensor obtains a reference point showing a boundary between a movable part of the object to be detected that moves in first and second images while the motion is performed and a fixed part of the object to be detected that is more immobile than the movable part, obtains a position of the movable part nearer the movable side than the reference point in the first and second images, and determines whether or not the motion is performed on the basis of a difference between the position of the movable part on the first image and the position of the movable part on the second image. |
