Biometric information registration device and biometric information registration method

A biometric information registration device, comprising:

• an input device;
• and
• a processor, wherein
• the input device configured to input biometric information,
• the processor configured to calculate quality information of the biometric information which is inputted by the input device,
• the processor configured to estimate quality of biometric information that will be inputted a next time, according to the quality information calculated by the processor,
• the processor configured to calculate estimated matching quality information which indicates a degree of matching between estimated quality information estimated by the processor and quality information of next biometric information calculated by the processor,
• the processor configured to calculate past quality information which indicates how quality of a plurality of pieces of estimated matching quality information varied in the past,
• the processor configured to determine whether or not the biometric information is to be registered according to the estimated matching quality information and the past quality information, and
• the processor configured to register the biometric information when the processor determines that the biometric information is to be registered.