1. An apparatus comprising: an acquisition unit configured to acquire an image obtained by capturing a space including a predetermined operation area in a background; a detection unit configured to detect an object being present on the operation area from the image acquired by the acquisition unit, using an image representing the background of the space; a recognition unit configured to recognize an instruction to the apparatus input by a user hand, based on a movement of an object detected by the detection unit; and an updating unit configured to update the image representing the background of the space to be used by the detection unit, based on, an image in which an object detected by the detection unit and presumed not to be the user hand is captured in image acquired by the acquisition unit.