1. An individual verification apparatus, comprising: a camera configured to take a face image in an image region in which an individual is irradiated from a light source and observed from a fixed line-of-sight direction, a direction of the light source varying with time; a database configured to associate the face image by the camera with unique information of the individual, the face image having a first brightness value thereof and a first light reception direction thereof in the image region; and a processing unit coupled to a memory and the database, the processing unit facilitating execution of instructions to perform operations comprising: correcting at least one of a second brightness value and a second light reception direction of image data to match the first brightness value and the first light reception direction, the image data stored in the memory for verification, the second brightness value and the second light reception direction being obtained at a timing different from another timing at which the first brightness value and the first light reception direction are obtained, respectively, and verifying the individual using a face part in the image data for verification and the face image stored in the database.