Title:
レーザー光による眼底血流測定を利用した個人認証方法及び個人認証装置
Document Type and Number:
Japanese Patent JP4872082
Kind Code:
B2
Abstract:
A personal authentication method comprising imaging, on an image sensor as a laser speckle using an optical system, light reflected from retinal blood vessels of the ocular fundus and a blood vessel layer in ocular fundus internal tissue when a laser beam is expanded and made to irradiate the ocular fundus, calculating a quantity that represents the rate of change with respect to time of the amount of light received for each pixel of the laser speckle, obtaining an ocular fundus blood flow map as a two-dimensional map of the numerical values of the quantity, and comparison-checking against pre-registered personal data utilizing at least one, observed in the blood flow map, of blood flow distribution data, a pattern reflecting the course of retinal blood vessels, a pattern reflecting the course of blood vessels in ocular fundus internal tissue observed superimposed thereon, and data on changes thereof over time, and a device therefor. In accordance with the method and device of the present invention utilizing the ocular fundus blood flow rate map, a personal authentication method and device can be obtained that have remarkably higher accuracy than conventional methods and devices.
Inventors:
Hitoshi Fujii
Naoki Konishi
Naoki Konishi
Application Number:
JP2006158542A
Publication Date:
February 08, 2012
Filing Date:
June 07, 2006
Export Citation:
Assignee:
Kyushu Institute of Technology
International Classes:
A61B5/117; A61B5/026; G06F21/32; G06T1/00; G06T7/00
Domestic Patent References:
| JP2006107028A | ||||
| JP10005196A |
Foreign References:
| WO2006046627A1 | ||||
| WO2005122896A1 |
Attorney, Agent or Firm:
Maeda Junhiro