Dictionary creation device, biometrics device, monitoring system, dictionary creation method, and recording medium

A dictionary creation method comprising:

• acquiring a plurality of images captured at intervals within a predetermined area;
• extracting a feature of a person included in each of the plurality of images;
• calculating a similarity between the feature of a first person included in one image of the plurality of images and the feature of a second person included in another image or a plurality of other images;
• and
• determining whether to register information regarding the first person in a dictionary based on the similarity.

A non-transitory recording medium storing a program for causing a computer to execute:

• acquiring a plurality of images captured at intervals within a predetermined area;
• extracting a feature of a person included in each of the plurality of images;
• calculating a similarity between the feature of a first person included in one image of the plurality of images and the feature of a second person included in another image or a plurality of other images;
• and
• determining whether to register information regarding the first person in a dictionary based on the similarity.