Abstract: An illumination normalizing apparatus, method, and medium and a face recognition apparatus, method, and medium using the illumination normalizing apparatus, method, and medium are provided. The illumination normalizing apparatus comprises a basis vector generation unit which generates a plurality of basis vectors to represent a plurality of illumination conditions of each of a plurality of face images included in a training set, an illumination normalizing coefficient obtaining unit which obtains an illumination normalizing coefficient from a first face image using the basis vectors, and an illumination-normalized image obtaining unit which obtains an illumination-normalized image from a second face image using the basis vectors and the illumination normalizing coefficient.

Abstract: A method and an apparatus for constructing classifiers based on face texture information and a method and an apparatus for recognizing a face using statistical features of texture information.