An example embodiment includes: an acquisition unit that acquires a first image generated by capturing an object by using a light at a first wavelength, a second image generated by capturing the object by using a light at a second wavelength, and depth information on the object； a detection unit that detects a face included in the second image； a check unit that, based on the depth information, checks whether or not a face detected by the detection unit is one obtained by capturing a living body； and an extraction unit that, based on information on a face checked by the check unit as obtained by capturing a living body, extracts a face image from the first image.
