Biometric authentication device, method of controlling biometric authentication device and non-transitory, computer readable storage medium

摘要

A biometric authentication device includes a storage unit that stores a plurality of pieces of reference biometric data, an identification control unit that extracts reference biometric data where a coefficient for determining a similarity to acquired biometric data is greater than or equal to a first threshold value, a similar region extraction unit that obtains coefficients for determining similarities between the plural pieces of extracted reference biometric data, in units of predetermined regions, and extracts a similar region where the coefficient for similarity determination is greater than or equal to a second threshold value when a plurality of pieces of reference biometric data are extracted by the identification control unit, and a judgment unit that weights a coefficient for determining a similarity to a dissimilar region, compared with the coefficient for determining a similarity to the extracted similar region, and judging the degree of similarity.

主权项

1. A biometric authentication device comprising:
a memory; and a processor coupled to the memory and configured to execute a process including:
comparing acquired biometric data with a plurality of pieces of reference biometric data;when a match occurs between the acquired biometric data and at least two of the plurality of pieces of reference biometric data, determining whether corresponding regions in the at least two of the plurality of pieces of reference biometric data are similar to each other, the at least two of the plurality of pieces of reference biometric data being divided into regions; weighting similar regions among the corresponding regions, with a first weighting and weighting dissimilar regions of the at least two pieces of reference biometric data with a second weighting which is different from the first weighting; and
judging a degree of similarity between the acquired biometric data and the weighted pieces of reference biometric data, based on the weighted similar regions and the weighted dissimilar regions.