Biometric authentication device and computer readable, non-transitory medium

摘要

A biometric authentication device includes a biometric sensor that obtains an image of a biometric authentication portion of a user without contacting, a distance sensor that obtains a distance between the biometric sensor and the biometric authentication portion, and a guidance image display unit that shows a guidance image for guiding the biometric authentication portion to a distance that is appropriate for the biometric sensor to obtain the biometric authentication portion, the guidance image changing continuously or in stages according to the distance obtained by the distance sensor.

主权项

1. A biometric authentication device comprising:
a biometric sensor that obtains an image of a biometric authentication portion of a user without contacting; a distance sensor that obtains a distance between the biometric sensor and the biometric authentication portion; a memory; and a processor configured to generate a guidance image for guiding the biometric authentication portion to a distance that is appropriate for the biometric sensor to obtain the biometric authentication portion by changing a reference image based on the distance obtained by the distance sensor by performing a blurring process on the reference image with use of a convolution theorem and to show the guidance image on a display, the guidance image changing continuously or in stages according to the distance obtained by the distance sensor.