Patent Document ID: 8855378
Application ID: 13534214
Patent Status: 1

Claim One:
1. A biometric authentication device comprising: a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute: acquiring time-series biological images by repeatedly imaging a biological part of an authenticated person while changing a relative position with respect to the biological part; detecting a pixel value corresponding to a same position among the time-series biological images; extracting a pixel of which the pixel value includes a surface reflection component from the biological part, from each of the time-series biological images, based on a degree of divergence of temporal variation of the pixel value of the detected pixel in the time-series biological images from an estimation result of temporal variation of a pixel value in all pixels that constitute the time-series biological images; generating a biological image including no surface reflection from the biological part by correcting the pixel value of the extracted pixel based on a pixel value of a pixel corresponding to the extracted pixel in each of the time-series biological images other than an extraction origin of the extracted pixel; and performing personal authentication of the authenticated person by using the biological image that is generated.