Patent ID: 7662047

Claim:
An information processing apparatus provided with an input system utilizing a stroboscope, comprising: a stroboscope including a light source outputting a light of a specific wavelength range; a base unit which includes a supporting cylinder having an opening and a lens provided below said opening in said supporting cylinder; a filter provided so as to cover said opening of said supporting cylinder and passing only the light of said specific wavelength range; a first object including a first retroreflective body; said light source being provided in the vicinity of said filter so as to light up said first object; an imager, which is provided within said base unit and below said lens, imaging said first object at a light-emission and at a non-light-emission of said stroboscope to produce a plurality of image signals at light-emission and a plurality of image signals at non-light emission; a calculator calculating a part or all of information of a position, a size, a velocity, an acceleration, a moving path pattern of said first object by detecting a first notable portion in correspondence to said first retroreflective body from a difference between said image signals at light-emission and said image signals at non-light emission; and an information processor performing information processing according to an application on the basis of the information calculated based on said difference by said calculator to provide an output according to said application.