Patent ID: 8509500
Filing Date: 2013-08-13
Classification: G06K

Abstract:
1. A fingerprint authentication device comprising: an authentication success/failure judging unit that judges whether a fingerprint authentication process has successfully been performed, based on a comparison result obtained by comparing input fingerprint information generated from a fingerprint image input through a fingerprint sensor with registered fingerprint information registered in advance; an overlapping area size obtaining unit that, in a case where the authentication success/failure judging unit has obtained an authentication result indicating that the fingerprint authentication process has failed, obtains an overlapping area size corresponding to a time when the input fingerprint information and the registered fingerprint information overlap each other the most; a requestability judging unit that judges whether a re-input of the input fingerprint image is to be requested, by using the overlapping area size obtained by the overlapping area size obtaining unit and a similarity level that indicates a matching degree between the input fingerprint information and the registered fingerprint information corresponding to the time when the input fingerprint information and the registered fingerprint information overlap each other the most; and a re-input requesting unit that requests the re-input of the input fingerprint image in a case where the requestability judging unit has obtained a judgment result indicating that the re-input of the input fingerprint image is to be requested.