| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a biometric authentication device appropriately determining deterioration of performance due to dirt. <P>SOLUTION: The amount of dirt on an imaging part 1 is detected by a dirt detection part 2, and accumulated in a dirt amount history storage part 3 as history of the amount of dirt. A collation result history storage part 9 accumulates a collation result by a collation part 8 as history. A dirt determination condition calculation part 10 calculates dirt determination conditions on the basis of the history of dirt amounts and the history of collation results. A dirt determination part 11 determines whether or not there is a dirt causing the deterioration in authentication performance on the basis of the dirt determination condition calculated by the dirt determination condition calculation part 10 and the amount of dirt detected at that point of time, and when such dart is determined, a dirt notification part 12 gives notification. <P>COPYRIGHT: (C)2010,JPO&INPIT |
