1. An information processing device comprising: an image inputter configured to input image data in which a user has been captured; an extractor configured to extract a region corresponding to a hand of the user included in the image data input by the image inputter; a determinator configured to determine whether or not the region corresponding to the hand of the user extracted by the extractor is in a stationary state; a recognizer configured to, if the region corresponding to the hand of the user is determined by the determinator as being in a stationary state, recognize the shape of the region corresponding to the hand of the user extracted by the extractor; and an inputter configured to input data associated with the shape recognized by the recognizer, wherein the extractor is further configured to set a rectangle that circumscribes a movement region obtained from difference data between frames in the image data input by the image inputter, specify a region corresponding to a wrist of the user, on the basis of a width of the hand included in the movement region obtained by scanning the inside of the rectangle, and extract the region corresponding to the hand of the user, on the basis of the specified region corresponding to the wrist of the user.