1. A gesture recognition apparatus detecting a gesture from an acquired image and generating for an object device an instruction corresponding to the gesture, the gesture recognition apparatus comprising: an image acquiring unit configured to acquire an image; an object part extracting unit configured to extract an object part performing a gesture from the acquired image; an object part shape identifying unit configured to identify a shape of the extracted object part; a representative point determining unit configured to set, with respect to the object part, a representative point that is a point representing a position of the object part; a gesture recognizing unit configured to recognize a gesture, based on a motion of the representative point; and a command generating unit configured to generate an instruction corresponding to the recognized gesture, wherein the representative point determining unit determines a position of a representative point corresponding to the object part, using the identified shape of the object part.