1. A processing device, comprising: a storage for storing detection information; and at least one processor operable to: detect a face region of an image; set at least one action region based on position of the face region, wherein the at least one action region comprises at least one area outside the face region; extract face information from the face region, wherein the face information identifies a user; determine individual detection information associated with the identified user from the stored detection information, wherein the determined individual detection information comprises a plurality of predetermined actions associated with the identified user and corresponding processing to be executed in response to the plurality of predetermined actions being performed by the identified user; compare image data corresponding to the at least one action region with the individual detection information to determine whether a predetermined action of the plurality of predetermined actions associated with the identified user has been performed by the identified user; and execute processing corresponding to the determined predetermined action.