To provide a game device which progresses a game real time similarly to a case in which commands are inputted with an input device even in a gesture inputting game.

Movement of a part (hand, for instance) of the human body is imaged and binary image data are obtained from the gesture. Orientation information of the hand is detected by Hough transformation 205 to the binary image data and shape information indicating the numbers and angles of fingers are detected by centroidal profile extraction 206 from same binary image data. An input command corresponding to a combination of the orientation information and the shape information is determined (parameter adjustment) 208 among commands preliminarily prepared.