1. An apparatus comprising: a management unit configured to classify feature patterns each including feature information of a plurality of parts of a face region of an object extracted from image data for respective objects, and to manage the feature patterns using a dictionary; a segmenting unit configured to determine whether or not a feature information of each part of the face region of the object is configured to be segmented, and to segment, when said segmenting unit determines that the feature information is configured to be segmented, the feature information of the part of interest into a plurality of feature information as new feature information; and a registration unit configured to register, when said segmenting unit segments the feature information, a feature pattern as a combination of the new feature information of the part of interest and feature information of parts other than the part of interest, which are managed by said management unit, in the dictionary as a new feature pattern of the object.