Patent ID: 8644566
Filing Date: 2014-02-04
Classification: G06K

Abstract:
1. A biometric authentication device comprising: a biometric information acquiring unit which acquires a user's input biometric information and generates an input biometric image representing said input biometric information; a storage unit which stores data concerning registered biometric information of at least one registered user that is preregistered; and a processing unit, wherein said processing unit implements: a moderately blurred region detection function which detects from said input biometric image a moderately blurred region having a first degree of blurring; a highly blurred region detection function which detects from said input biometric image a highly blurred region having a second degree of blurring which is higher than said first degree of blurring; a blurring cause identifying function which, when said highly blurred region is detected and when said moderately blurred region is detected within a search area defined adjacent to said highly blurred region, then determines that said highly blurred region and said moderately blurred region have occurred due to a first cause and which, when said highly blurred region is detected and when said moderately blurred region is detected outside said search area, or when only one or the other of said highly blurred region and said moderately blurred region is detected, then determines that said highly blurred region or said moderately blurred region has occurred due to a second cause which is different from said first cause; a warning processing function which presents to said user a warning message which is different between said first cause and said second cause; and a matching function which, when at least one or the other of said highly blurred region and said moderately blurred region is detected from said input biometric image initially acquired, then matches said input biometric information represented in said input biometric image against said registered biometric information after said input biometric image has been regenerated by said biometric information acquiring unit reacquiring said user's biometric information in response to said warning message.