| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the accuracy in personal identification using a finger vein pattern by obtaining a finger image with good reproducibility, and properly performing image processing and collation processing. <P>SOLUTION: The finger image of a subject is obtained by a grip-shaped data acquisition unit 2, and is then sent to an arithmetic unit 5 via an inputting unit 4. In the finger image, an integration processing is carried out in the long axis direction of the finger, in which most finger veins are running, while a differential processing is carried out in the intersecting short axis direction at right angles as a directional filtering. The image is then compared with the subject's finger image registration data registered in a storing unit 6 to be identified. In this method, the holding of the grip-shaped data acquisition unit having a curvature enables the acquisition of image data of a plurality of fingers with good reproducibility, and the directional filtering eliminates uneven background from the finger image. Therefore, it is possible to obtain a vessel-emphasized image which can be suitably used for identification computation to achieve highly-accurate personal identification. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
