Patent ID: 8102380

Claim:
An information processing device comprising: a position detecting section configured to detect a position of a hand from an input image of the hand; a memory section configured to store data of the position of the hand detected by the position detecting section; a rotation judging section configured to judge, assuming that records of the data of the position of the hand stored in the memory section show a rotary movement, that a latest position of the hand falls in an angle range predicted for the rotary movement; an executing section configured to, when the rotation judging section judges that the latest position of the hand falls in the angle range, obtain a rotational angle at the latest position of the hand and also execute a process that corresponds to a predetermined rotary movement of the hand; and a distance determining section that determines a first distance that indicates a distance between the latest position of the hand and a center of the rotary movement assumed by the rotation judging section, wherein, when it is judged that the first distance is smaller than a second distance indicating a radius of the rotary movement assumed by the rotation judging section, the executing section executes the process with the rotational angle reduced proportionately with the first distance.