CPC G06V 40/1359 (2022.01) [G06F 18/2163 (2023.01); G06N 5/04 (2013.01); G06N 20/00 (2019.01); G06V 10/25 (2022.01); G06V 10/30 (2022.01); G06V 10/993 (2022.01); G06V 40/1376 (2022.01)] | 22 Claims |
1. A fingerprint authentication device, comprising:
a biometric sensor configured to generate a sensing signal by sensing biometric information;
an image processor configured to generate a fingerprint image based on the sensing signal;
a singular point determiner circuit configured to select at least one fingerprint piece based on the fingerprint image or the sensing signal, and determine a singular point of the fingerprint image by analyzing the selected at least one fingerprint piece,
wherein the image processor is further configured to:
extract an interest region including the singular point from the fingerprint image based on a coordinate of the singular point;
convert the sensing signal into a first fingerprint image in a digital form, which corresponds to the fingerprint image;
detect a noise region influenced by noise caused by an external environment in the first fingerprint image, and generate a second fingerprint image by blurring the noise region; and
determine the interest region having a predetermined size, which includes the singular point, in the second fingerprint image, and discard a remaining portion of the second fingerprint image other than the interest region; and
an authenticator circuit configured to perform fingerprint authentication by comparing the interest region with registered fingerprint information.
|