US 11,755,710 B2
Biometric authentication device, biometric authentication method, and computer readable medium
Shun Hinatsu, Tokyo (JP); and Daisuke Suzuki, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
Filed on May 11, 2022, as Appl. No. 17/742,156.
Application 17/742,156 is a continuation of application No. PCT/JP2020/000295, filed on Jan. 8, 2020.
Prior Publication US 2022/0269765 A1, Aug. 25, 2022
Int. Cl. G06K 9/62 (2022.01); G06F 21/32 (2013.01); G06V 40/12 (2022.01); G06V 40/13 (2022.01); G06V 40/10 (2022.01); G06V 40/50 (2022.01); A61B 5/0205 (2006.01); A61B 5/024 (2006.01); A61B 5/08 (2006.01); A61B 5/1172 (2016.01)
CPC G06F 21/32 (2013.01) [A61B 5/0205 (2013.01); A61B 5/02433 (2013.01); A61B 5/0816 (2013.01); A61B 5/1172 (2013.01); G06V 40/1306 (2022.01); G06V 40/1365 (2022.01); G06V 40/15 (2022.01); G06V 40/50 (2022.01)] 6 Claims
OG exemplary drawing
 
1. A biometric authentication device to execute authentication to a target person by biometric authentication, the biometric authentication device comprising:
processing circuitry to:
perform a measurement process for measuring a biological signal from the target person, the biological signal being able to be measured in a manner to be unnoticeable by the target person,
separate a respiration component derived from respiratory movement and a pulse component derived from a pulse, from the biological signal and extract the respiration component and the pulse component as a plurality of authentication components being to be used for authentication,
extract a current feature amount indicating a present feature amount of each of the plurality of authentication components, from each of the plurality of authentication components,
register an identifier and a template feature amount in a memory, as template information, the identifier being used for identifying the target person, the template feature amount being a feature amount extracted from the target person in a past, and
compare the current feature amount to the template feature amount registered in the template information so as to return processing to the measurement process and repeat authentication when a difference between the current feature amount and the template feature amount is within a tolerance value, and so as to end the processing when the difference between the current feature amount and the template feature amount is larger than the tolerance value, wherein
the processing circuitry executes authentication by using a current feature amount of each of the respiration component and the pulse component in initial authentication, and executes authentication by using a current feature amount of only the respiration component in second and subsequent authentication.