Development of penetrate and reflection type finger vein certification

We independently have developed low-cost finger vein certification device. The light transmission of a finger differs depending on each person so we need automatic light intensity adjustment system to certificate each person. In this paper, we report the automatic system which controls light intensity by feedback control and it is controlled by intensities of captured images. This adjustment system makes possible to capture stable and high contrasted images which shows any finger veins. Moreover, we have developed two types of finger vein certification devices. One is penetrated type and the other is reflection type. The penetrated device shows over 99.9[%] certification rate, and the reflection device shows 98.82[%]. The former shows high certification accuracy, but the reflection device could be smaller than the penetrated device.