Biometric authentication device and biometric authentication method

A biometric authentication device includes a memory and a processor configured to obtain a first biometric image of a target for authentication, identify a first feature quantity set including a first pixel feature quantity of the first biometric image and a first coordinate feature quantity of the first biometric image, perform calculation of a degree of similarity between a first person factor vector of the first biometric image and a second person factor vector of a template in accordance with the first feature quantity set, a pixel feature quantity of the template, and a coordinate feature quantity of the template, and perform an authentication process of the first biometric image in accordance with the calculated degree of similarity.