| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent at reduced cost the recognition rate of a digital vein authentication device from being reduced by finger insertion errors by inexperienced users or the insertion of a fake finger by malicious users. <P>SOLUTION: This personal authentication device is provided with an imaging part for picking up images of digital veins; a light source for emitting light to be transmitted through a finger; an image computing part for collating the images; a guide part for indicating the image pickup positions of the finger; and a sensing part for sensing the touch of the finger to the guide part. Further, the device is provided with another light source for applying reflected light to the back of the finger; a switch part pushed in by the tip of the finger; still another light source for light passing through the tip of the finger; and a photocell for receiving the light passing through the tip of the finger. Furthermore, a display means is provided for indicating information to guide the user in using the device normally. Furthermore, the device is provided with a means for switching the device depending on the stability of authentication between 1-N authentication by which all registered images are collated and 1-1 authentication by which an ID number for identifying the user is inputted in advance to collate only the corresponding registered images, and a means for updating the registered data. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
