Abstract: Each time stepping motion of a player by a stepper 1 is detected, one firework object 214 appears on a television monitor 100 and then disappears. Each a predetermined number of times of the stepping motion of the player is detected, a more spectacular firework object than that of one step is displayed. If the player performs the stepping motion by frequency as a quota shown in a quota display section 212, this screen is finished.

Abstract: A position of a cursor 67 is controlled so that positions of retroreflective sheets 17L and 17R in real space coincides with positions of cursors 67 in a video image projected onto a screen 21, on the screen 21 in the real space. A processor 23 can recognize positions of the retroreflective sheets 17 on the video image via the cursors 67. Hence, the player 15 can perform input to the processor 23 by moving the retroreflective sheets 17L and 17R on the video image projected onto the screen 21 and indicating directly desired locations on the video image by the retroreflective sheets 17L and 17R.

Abstract: An imaging unit captures images of the retroreflective sheets worn on both legs. A multimedia processor detects step and jump of a player on the basis of the pictures obtained by the image capturing to reflect to a video image and thereby the interactive system is constituted. It is possible to support a user so as to continuously perform a stepping exercise while reducing an economical burden of the user and realizing the space saving.

Abstract: Each time stepping motion of a player by a stepper 1 is detected, one firework object 214 appears on a television monitor 100 and then disappears. Each a predetermined number of times of the stepping motion of the player is detected, a more spectacular firework object than that of one step is displayed. If the player performs the stepping motion by frequency as a quota shown in a quota display section 212, this screen is finished.

Abstract: An imaging unit captures images of the retroreflective sheets worn on both legs. A multimedia processor detects step and jump of a player on the basis of the pictures obtained by the image capturing to reflect to a video image and thereby the interactive system is constituted. It is possible to support a user so as to continuously perform a stepping exercise while reducing an economical burden of the user and realizing the space saving.

Abstract: A retroreflective sheet 32 is provided on the inner surface of a transparent member 44. A belt 40 is attached to the transparent member 44 along the bottom surface thereof in the form of an annular member. An operator inserts middle and annular fingers into the belt 40 in order that the transparent member 44 is located on the palm of the hand. The information processing apparatus 1 can determine an input operation when a hand is opened so that the image of the retroreflective sheet 32 is captured, and determine a non-input operation when a hand is closed so that the image of the retroreflective sheet 32 is not captured.

Abstract: A retroreflective sheet 13 (a sword 11) is imaged to obtain the maximum X-coordinate “maxX”, minimum X-coordinate “minX”, maximum Y-coordinate “maxY” and minimum Y-coordinate “minY” thereof. The pixel having the maximum luminance value among a plurality of pixels of which the X-coordinates are the maximum X-coordinate “maxX” is detected to acquire the Y-coordinate “AY[maxX]” of the pixel, while the pixel having the maximum luminance value among a plurality of pixels of which the X-coordinates are the minimum X-coordinate “minX” is detected to acquire the Y-coordinate “AY[minX]” of the pixel. Furthermore, a first characteristic point (X1, Y1) and a second characteristic point (X2, Y2) are determined on the basis of the result of comparing the Y-coordinate “AY[maxX]” and the Y-coordinate “AY[minX]”, and the tilt angle “An” of the sword 11 is calculated.

Abstract: A sword (3: FIG. 2) which is intermittently irradiated infrared light by infrared emitting diodes (7: FIG. 2) is photograph by an imaging unit (5: FIG. 2), and thereby motion of the sword is detected. The sword locus object (117: FIG. 14) representing a movement locus of the sword is displayed on a television monitor (90: FIG. 1) in response to detection of swing of the sword as a trigger.