1. A method of recognizing a hand gesture, the method comprising: acquiring, by a controller from an imaging device, a hand image, wherein a hand in the hand image is a recognition target; removing, by the controller, a static background image from the acquired hand image; removing, by the controller, a dynamic background image from the hand image in which the static background image is removed; and recognizing, by the controller, a gesture of the hand by extracting a characteristic point from the hand image in which the dynamic background image is removed.