A device for capturing person-specific data of a person, wherein the person-specific data comprises a facial image of the person, wherein the device has a camera for recording the facial image of the person, a lighting apparatus, and a semi-transparent mirror, wherein the semi-transparent mirror is arranged between the person and the camera, wherein the semi-transparent mirror is oriented such that, on the side of the semi-transparent mirror facing towards the person, the optical path of light incident on the semi-transparent mirror is parallel to the optical path of the portion of this light reflected back by the semi-transparent mirror, wherein the lighting apparatus is configured to illuminate the person from the front, wherein the device also has a control unit for capturing an image, by: - generating white light by means of the lighting apparatus in order to illuminate the face of the person and, during the illumination, capturing a first image of the face of the person by means of the camera, characterised by - capturing a second image of the face of the person by means of the camera without generation of the white light, - forming a first differential image of the first image and the second image, wherein in the first differential image the face of the person is freed from the background, wherein the person-specific data comprises the first differential image as the facial image, wherein the control unit is also configured to: - control the lighting apparatus for generation of coloured or infrared light by the lighting apparatus for illuminating the face of the person and to control the camera in order to capture a third image of the face of the person by the camera during the illumination, - capture a fourth image of the face of the person by means of the camera without the generation of the coloured or infrared light, - form a second differential image of the third image and the fourth image, wherein in the second differential image the face of the person is freed from the background, and to calculate the outer contours of the face from the second differential image, - correct the first differential image with the outer contours calculated from the second differential image. - generating white light by means of the lighting apparatus in order to illuminate the face of the person and, during the illumination, capturing a first image of the face of the person by means of the camera, characterised by - capturing a second image of the face of the person by means of the camera without generation of the white light, - forming a first differential image of the first image and the second image, wherein in the first differential image the face of the person is freed from the background, wherein the person-specific data comprises the first differential image as the facial image, - control the lighting apparatus for generation of coloured or infrared light by the lighting apparatus for illuminating the face of the person and to control the camera in order to capture a third image of the face of the person by the camera during the illumination, - capture a fourth image of the face of the person by means of the camera without the generation of the coloured or infrared light, - form a second differential image of the third image and the fourth image, wherein in the second differential image the face of the person is freed from the background, and to calculate the outer contours of the face from the second differential image, - correct the first differential image with the outer contours calculated from the second differential image.