| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an authentication means high in forgery-proof property, by detecting whether a person to be authenticated is living or not upon personal authentication, and to provide a means of a non-contact method for detecting whether the person is living or not and thereby to eliminate the requirement of an additional sensor. <P>SOLUTION: A plurality of vain images of a finger are taken by light emitted from a light source to the finger and then passing through the finger. The personal authentication is performed by comparison with a vein pattern registered in a recording means based on the vein images calculated by a image calculation circuit. At the same time, pulsation is detected by measurement of a time change in brightness value in the inside of the outline of the finger in the finger images, so that the determination is made whether the person to be authenticated is living or not. Therefore, the forgery-proof property is enhanced with the non-contact method that can detect whether the person to be authenticated is living or not. A health care function using the acquired pulsation information can be added to a system. <P>COPYRIGHT: (C)2004,JPO |
