1. An apparatus comprising: a first management unit configured to classify and manage feature information of a plurality of objects extracted from image data in units of similar feature information; a second management unit configured to classify and manage the plurality of objects extracted from the image data object by object; an association unit configured to associate the objects in the first management unit with feature information in the second management unit; and an input unit configured to input a correction instruction about classifications of the objects by the second management unit, wherein the second management unit is configured to, if the correction instruction is input by the input unit, correct and manage a classification to which a target object of the correction instruction belongs and the first management unit is configured to change and manage a classification to which feature information associated with the target object of the correction instruction belongs.