BIOMETRIC AUTHENTICATION DEVICE, BLOOD VESSEL IMAGE PHOTOGRAPHY DEVICE, AND METHOD

摘要

When photographing blood vessels with a plurality of image capture units with respect to one light source, it is difficult to establish the degree of light of the light source with which it is possible for the plurality of image capture units to clearly photograph the blood vessels simultaneously. Additionally, with a plurality of images which are photographed with different quantities of light, the positional relations of the blood vessels which are included in each image is uncertain, and information of the blood vessels overall configured by the plurality of images is uncertain. Provided is a blood vessel image photography device, with which a light quantity is controlled such that, with a first image capture unit which is positioned below a finger presentation unit and captures an image of blood vessels of the finger on the basis of light from a first light source which is transmitted through the finger, and on the basis of light which is transmitted through the finger from the first light source which is positioned to the side of the first image capture unit, a brightness value of an image of a portion of blood vessels which is captured with the first image capture unit and a brightness value of an image of a portion of blood vessels which is captured with a second image capture unit are brightness values within a first range, and the first image capture unit and the second image capture unit respectively capture images on the basis of the light from the first light source, the light quantity for which is controlled.