IMAGE PROCESSING DEVICE, GAME APPARATUS, AND COMPUTER PROGRAM

PROBLEM TO BE SOLVED: To provide a game apparatus, wherein the game apparatus displays, at the specified position, an image indicating the specified position, without making an operator feel visual annoyance, with precision not depending on the acceleration applied to the controller, and at sufficiently short time intervals, in an arbitrary device for specifying the position on a screen by moving a controller.SOLUTION: A game apparatus 1 includes a fixed body, a movable controller held by a player, and a fixed display unit. The controller has a light source. The display unit has a screen. The body has light receiver units 9L and 9R for receiving light emitted from the light source and detecting the intensity of the received light, and a processor. The processor detects the position of the controller based on the intensity of the received light which is detected by the light receiver units 9L and 9R, calculates the position of an intersection point on a screen, at which a straight line between the detected position and a predetermined reference position intersects the screen, and controls the display unit so that an image indicating the intersection point is displayed at the position of the intersection point on the screen.