Faces are detected efficiently, while preventing deterioration of face detection accuracy due to brightness during photography or the type of illumination which is employed during photography. When an image is obtained by an imaging means, an illumination judging means judges whether the illumination employed during photography is provided tungsten light source. In the case that the illumination is provided by a tungsten light source, face detection is performed based on a red signal image. In the case that the illumination is not provided by a tungsten light source, face detection is performed based on a green signal image.